How many chromosomes per cell does a Down's Syndrome (trisomy 21) victim have?

How many chromosomes per cell does a Down's Syndrome (trisomy 21) victim have?
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ANSWER: 47
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Mongolian Idiocy due to trisomy in 21st chromsome is called (a) Down’s syndrome (b) Turner’s syndrome (c) Klinefelter’s syndrome (d) Triple X syndrome

Description : Mongolian Idiocy due to trisomy in 21st chromsome is called (a) Down’s syndrome (b) Turner’s syndrome (c) Klinefelter’s syndrome (d) Triple X syndrome

Last Answer : (a) Down’s syndrome

A woman with 47 chromosomes due to three copies of chromosome 21 is characterised by (a) superfemaleness (b) triploidy (c) Turner’s syndrome (d) Down’s syndrome.

Description : A woman with 47 chromosomes due to three copies of chromosome 21 is characterised by (a) superfemaleness (b) triploidy (c) Turner’s syndrome (d) Down’s syndrome.

Last Answer : (d) Down’s syndrome.

.Down’s syndrome in humans is due to (a) three ‘X’ chromosomes (b) three copies of chromosome 21 (c) monosomy (d) two ‘Y’ chromosomes.

Description : .Down’s syndrome in humans is due to (a) three ‘X’ chromosomes (b) three copies of chromosome 21 (c) monosomy (d) two ‘Y’ chromosomes.

Last Answer : b) three copies of chromosome 21

Down Syndrome, a congenital genetic disorder in human beings, is cased by : (a) a defective recessive gene in homozygous condition (b) an extra x chromosome (c) trisomy of chromosome 18 (d) trisomy of chromosome 21

Description : Down Syndrome, a congenital genetic disorder in human beings, is cased by : (a) a defective recessive gene in homozygous condition (b) an extra x chromosome (c) trisomy of chromosome 18 (d) trisomy of chromosome 21

Last Answer : Ans:(d)

.In human beings 45 chromosomes/single X/XO abnormality causes (a) Down’s syndrome (b) Kinefelter’s syndrome (c) Turner’s syndrome (d) Edward’s syndrome

Description : .In human beings 45 chromosomes/single X/XO abnormality causes (a) Down’s syndrome (b) Kinefelter’s syndrome (c) Turner’s syndrome (d) Edward’s syndrome

Last Answer : (c) Turner’s syndrome

Down’s syndrome is due to (a) crossing over (b) linkage (c) sex-linked inheritance (d) non-disjunction of chromosomes.

Description : Down’s syndrome is due to (a) crossing over (b) linkage (c) sex-linked inheritance (d) non-disjunction of chromosomes.

Last Answer : (d) non-disjunction of chromosomes.

.A person with the sex chromosomes XXY suffers from (a) gynandromorphism (b) Klinefelter’s syndrome (c) Down’s syndrome (d) Turner’s syndrome.

Description : .A person with the sex chromosomes XXY suffers from (a) gynandromorphism (b) Klinefelter’s syndrome (c) Down’s syndrome (d) Turner’s syndrome.

Last Answer : (b) Klinefelter’s syndrome

Down’s syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring produced by an affected mother and a normal father would be affected by this disorder? (a) 100% (b) 75% (c) 50% (d) 25%

Description : Down’s syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring produced by an affected mother and a normal father would be affected by this disorder? (a) 100% (b) 75% (c) 50% (d) 25%

Last Answer : (c) 50%

Cri-du-chat syndrome in humans is caused by the (a) trisomy of 21st chromosome (b) fertilisation of an XX egg by a normal Y-bearing sperm (c) loss of half of the short arm of chromosome 5 (d) loss of half of the long arm of chromosome 5.

Description : Cri-du-chat syndrome in humans is caused by the (a) trisomy of 21st chromosome (b) fertilisation of an XX egg by a normal Y-bearing sperm (c) loss of half of the short arm of chromosome 5 (d) loss of half of the long arm of chromosome 5.

Last Answer : (c) loss of half of the short arm of chromosome 5

What protein deos trisomy 21 code for?

Description : What protein deos trisomy 21 code for?

Last Answer : Feel Free to Answer

Nondisjunction of a chromosome results in which of the following diagnoses? a) Down Syndrome When a pair of chromosomes fails to separate completely and creates a sperm or oocyte that contains two copies of a particular chromosome (nondisjunction) Down syndrome results from three number 21 chromosomes. b) Huntingon Disease Huntington disease is one example of a germ-line mutation. c) Duchenne Muscular Dystrophy Duchenne muscular dystrophy, an inherited form of muscular dystrophy, is an example of a genetic caused by structural gene mutations. d) Marphan Syndrome Marphan Syndrome is a genetic condition that may occur in a single family member as a result of spontaneous mutation.

Description : Nondisjunction of a chromosome results in which of the following diagnoses? a) Down Syndrome When a pair of chromosomes fails to separate completely and creates a sperm or oocyte that contains two ... genetic condition that may occur in a single family member as a result of spontaneous mutation.

Last Answer : a) Down Syndrome When a pair of chromosomes fails to separate completely and creates a sperm or oocyte that contains two copies of a particular chromosome (nondisjunction) Down syndrome results from three number 21 chromosomes.

Which of the following is a correct match? (a) Down’s syndrome - 21st chromosome (b) Sickle cell anaemia - X-chromosome (c) Haemophilia - Y-chromosome (d) Parkinson’s disease - X and Y chromosome

Description : Which of the following is a correct match? (a) Down’s syndrome - 21st chromosome (b) Sickle cell anaemia - X-chromosome (c) Haemophilia - Y-chromosome (d) Parkinson’s disease - X and Y chromosome

Last Answer : a) Down’s syndrome - 21st chromosome

Pick out the correct statements. (1) Haemophilia is a sex-linked recessive disease. (2) Down’s syndrome is due to aneuploidy. (3) Phenylketonuria is an autosomal recessive gene disorder. (4) Sickle cell anaemia is an X-linked recessive gene disorder. (a) (1), (3) and (4) are correct. (b) (1), (2) and (3) are correct. (c) (1) and (4) are correct. (d) (2) and (4) are correct.

Description : Pick out the correct statements. (1) Haemophilia is a sex-linked recessive disease. (2) Down's syndrome is due to aneuploidy. (3) Phenylketonuria is an autosomal recessive gene disorder. (4) Sickle cell anaemia is an X- ... are correct. (c) (1) and (4) are correct. (d) (2) and (4) are correct.

Last Answer : (b) (1), (2) and (3) are correct.

.A disease caused by an autosomal primary non- disjunction is (a) Klinefelter’s syndrome (b) Turner’s syndrome (c) Sickle cell anaemia (d) Down’s syndrome.

Description : .A disease caused by an autosomal primary non- disjunction is (a) Klinefelter’s syndrome (b) Turner’s syndrome (c) Sickle cell anaemia (d) Down’s syndrome.

Last Answer : (d) Down’s syndrome.

The most striking example of point mutation is found in a disease called (a) Down’s syndrome (b) sickle cell anaemia (c) thalassaemia (d) night blindness.

Description : The most striking example of point mutation is found in a disease called (a) Down’s syndrome (b) sickle cell anaemia (c) thalassaemia (d) night blindness.

Last Answer : (b) sickle cell anaemia

A disease caused by an autosomal primary non- disjunction is : (1) Klinefelter's Syndrome(2) Turner's Syndrome (3) Sickel Cell Anemia (4) Down's Syndrome

Description : A disease caused by an autosomal primary non- disjunction is : (1) Klinefelter's Syndrome(2) Turner's Syndrome (3) Sickel Cell Anemia (4) Down's Syndrome

Last Answer : (4) Down's Syndrome

Number of chromosomes in Down's syn- drome is?

Description : Number of chromosomes in Down's syn- drome is?

Last Answer : 47

Would it be hard for a prosperous, handsome man to fall in love with a woman with Downs' Syndrome?

Description : Would it be hard for a prosperous, handsome man to fall in love with a woman with Downs' Syndrome?

Last Answer : Maybe she has a sweet, loving nature, which he could value and cherish. The things that connect people aren’t always obvious to the rest of us, but they can be very powerful.

Are Down's Syndrome people happier than other people?

Description : Are Down's Syndrome people happier than other people?

Last Answer : answer:The question is understandable. It often seems that they are happier based upon brief interactions and what is portrayed on television and movies. Down Syndrome is not a disease. It is a genetic ... parents. It is an opportunity to not only learn more about DS but make some new friends.

What would you think of someone who suggested that the Korean infants she saw looked like they might have Downs syndrome?

Description : What would you think of someone who suggested that the Korean infants she saw looked like they might have Downs syndrome?

Last Answer : I would ask what are her qualifications to know what she’s assuming.

A couple, both severely retarded/down's syndrome/etcetera: should society literally prevent them from having children?

Description : A couple, both severely retarded/down's syndrome/etcetera: should society literally prevent them from having children?

Last Answer : Your other question was easier. Neither of them are able to take care of the child?

Apart from monkeys or the ape family, in what other species has Down's syndrome been detected?

Description : Apart from monkeys or the ape family, in what other species has Down's syndrome been detected?

Last Answer : Mice can have downs as well and science is using them to study the issue. It is caused by the presence of all or part of an extra 21st chromosome.

Symptoms and causes of Down's syndrome? -Biology

Description : Symptoms and causes of Down's syndrome? -Biology

Last Answer : answer:

What if a baby has Down's syndrome?

Description : I'm over 35, I'm only in my early pregnancy, I'm 7 weeks old, but I'm really scared. I want to have a great baby, we have been waiting for it for a long time, 1.5 years and I don't know what if ...

Last Answer : You shouldn't have to worry so much in advance, but of course I understand. Be sure to discuss with your partner what you want. It must be a responsible decision by two people.

People with Down's syndrome invariably affected by: (1) Huntington's disease (2) Alzheimer's disease (3) Meningitis (4) Brain haemorrhage

Description : People with Down's syndrome invariably affected by: (1) Huntington's disease (2) Alzheimer's disease (3) Meningitis (4) Brain haemorrhage

Last Answer : (2) Alzheimer's disease Explanation: The best-known and most common chromosome abnormality in humans is Down's syndrome, a condition associated with an extra chromosome 21. Down's syndrome individuals ... develop this disease in their fourth or fifth decade of life, much sooner than other people

Webbed neck is a characteristic of – (1) Down's syndrome (2) Turner's syndrome (3) Klinefelter's syndrome (4) Cri-du-chat syndrome

Description : Webbed neck is a characteristic of – (1) Down's syndrome (2) Turner's syndrome (3) Klinefelter's syndrome (4) Cri-du-chat syndrome

Last Answer : (2) Turner's syndrome Explanation: A webbed neck, or pterygium colli deformity, is a congenital skin fold that runs along the sides of the neck down to the shouldersit is a feature of Turner ... Syndrome (TS) is a condition in which a female is partly or completely missing an X chromosome.

In Down’s syndrome of a male child, the sex complement is (a) XO (b) XY (c) XX (d) XXY.

Description : In Down’s syndrome of a male child, the sex complement is (a) XO (b) XY (c) XX (d) XXY.

Last Answer : (b) XY

An abnormal human male phenotype involving an extra X-chromosome (XXY) is a case of (a) Edward’s syndrome (b) Klinefelter’s syndrome (c) intersex (d) Down’s syndrome.

Description : An abnormal human male phenotype involving an extra X-chromosome (XXY) is a case of (a) Edward’s syndrome (b) Klinefelter’s syndrome (c) intersex (d) Down’s syndrome.

Last Answer : (b) Klinefelter’s syndrome

.In which of the following diseases, the man has an extra X-chromosome? (a) Turner’s syndrome (b) Klinefelter’s syndrome (c) Down’s syndrome (d) Haemophilia

Description : .In which of the following diseases, the man has an extra X-chromosome? (a) Turner’s syndrome (b) Klinefelter’s syndrome (c) Down’s syndrome (d) Haemophilia

Last Answer : (b) Klinefelter’s syndrome

.********* disease is another name for (a) haemophilia B (b) hepatitis B (c) Down’s syndrome (d) sleeping sickness.

Description : .Christmas disease is another name for (a) haemophilia B (b) hepatitis B (c) Down’s syndrome (d) sleeping sickness.

Last Answer : a) haemophilia B

.Which one of the following conditions in humans is correctly matched with its chromosomal abnormality/linkage? (a) Erythroblastosis fetalis - X-linked (b) Down’s syndrome - 44 autosomes + XO (c) Klinefelter’s syndrome - 44 autosomes + XXY (d) Colour blindness - Y-linked

Description : .Which one of the following conditions in humans is correctly matched with its chromosomal abnormality/linkage? (a) Erythroblastosis fetalis - X-linked (b) Down’s syndrome - 44 autosomes + XO (c) Klinefelter’s syndrome - 44 autosomes + XXY (d) Colour blindness - Y-linked

Last Answer : (c) Klinefelter’s syndrome - 44 autosomes + XXY

What is the genetic disorder in which an individual has an overall masculine development, gynaecomastia and is sterile? (a) Down’s syndrome (b) Turner’s syndrome (c) Klinefelter’s syndrome (d) Edward syndrome

Description : What is the genetic disorder in which an individual has an overall masculine development, gynaecomastia and is sterile? (a) Down’s syndrome (b) Turner’s syndrome (c) Klinefelter’s syndrome (d) Edward syndrome

Last Answer : Klinefelter’s syndrome

Which of the following cannot be detected in a developing fetus by amniocentesis? (a) Down’s syndrome (b) Jaundice (c) Klinefelter’s syndrome (d) Sex of the fetus

Description : Which of the following cannot be detected in a developing fetus by amniocentesis? (a) Down’s syndrome (b) Jaundice (c) Klinefelter’s syndrome (d) Sex of the fetus

Last Answer : (b) Jaundice

In context of amniocentesis, which of the following statements is incorrect? (a) It can be used for detection of Down’s syndrome. (b) It can be used for detection of cleft palate. (c) It is usually done when a woman is between 14-16 weeks pregnant. (d) It is used for prenatal sex determination.

Description : In context of amniocentesis, which of the following statements is incorrect? (a) It can be used for detection of Down’s syndrome. (b) It can be used for detection of cleft palate. (c) It is usually done when a woman is between 14-16 weeks pregnant. (d) It is used for prenatal sex determination.

Last Answer : (b) It can be used for detection of cleft palate

Which of the following conditions is not associated with periodontal destruction in primary teeth: a. Down’s syndrome. b. Steven Johnson’s syndrome. c. Hypophosphatasia. d. Papillon. Lefebvre syndrome. e. Cyclic neutropenia.

Description : Which of the following conditions is not associated with periodontal destruction in primary teeth: a. Down’s syndrome. b. Steven Johnson’s syndrome. c. Hypophosphatasia. d. Papillon. Lefebvre syndrome. e. Cyclic neutropenia.

Last Answer : b. Steven Johnson’s syndrome.

Which of the following is NOT characteristic of Down’s syndrome? A. Decreased neutrophil function B. Macroglossia C. Macrodontia D. An increased susceptibility to periodontal disease E. Congenitally missing teeth

Description : Which of the following is NOT characteristic of Down’s syndrome? A. Decreased neutrophil function B. Macroglossia C. Macrodontia D. An increased susceptibility to periodontal disease E. Congenitally missing teeth

Last Answer : C. Macrodontia

Hypodontia can be seen in: A. Cleidocranial dysplasia “dysostosis” B. Down’s syndrome C. Papillon fever syndrome D. Rickets

Description : Hypodontia can be seen in: A. Cleidocranial dysplasia “dysostosis” B. Down’s syndrome C. Papillon fever syndrome D. Rickets

Last Answer : B. Down’s syndrome

Which of the following conditions is not associated with periodontal destruction in primary teeth: A. Down’s syndrome B. Steven Johnson’s syndrome C. Hypophosphatasia D. Papillon-Lefebvre syndrome E. Cyclic neutropenia

Description : Which of the following conditions is not associated with periodontal destruction in primary teeth: A. Down’s syndrome B. Steven Johnson’s syndrome C. Hypophosphatasia D. Papillon-Lefebvre syndrome E. Cyclic neutropenia

Last Answer : B. Steven Johnson’s syndrome

Which of the following is NOT characteristic of Down’s syndrome? A. Decreased neutrophil function B. Macroglossia C. Macrodontia D. An increased susceptibility to periodontal disease E. Congenitally missing teeth

Description : Which of the following is NOT characteristic of Down’s syndrome? A. Decreased neutrophil function B. Macroglossia C. Macrodontia D. An increased susceptibility to periodontal disease E. Congenitally missing teeth

Last Answer : C. Macrodontia

Typical features of Down’s syndrome (Mongolism) do not include: A. Multiple immunodeficiencies B. Sever caries but minimal periodontal disease C. Susceptibility to infections D. Multiple missing teeth and malocclusion E. Hepatitis B carriage in institutionalised patients

Description : Typical features of Down’s syndrome (Mongolism) do not include: A. Multiple immunodeficiencies B. Sever caries but minimal periodontal disease C. Susceptibility to infections D. Multiple missing teeth and malocclusion E. Hepatitis B carriage in institutionalised patients

Last Answer : B. Sever caries but minimal periodontal disease

28 years old woman with previous history of having baby with Down’s Syndrome is now 12 weeks pregnant. Which of the following would you suggest to her: a) Amniocentesis. b) Obstetric ultrasound. c) Chorionic villus sampling. d) Fetal blood sampling. e) Wait till eighteen weeks for detailed ultrasound and amniocentesis.

Description : 28 years old woman with previous history of having baby with Down's Syndrome is now 12 weeks pregnant. Which of the following would you suggest to her: a) Amniocentesis. b) Obstetric ... sampling. d) Fetal blood sampling. e) Wait till eighteen weeks for detailed ultrasound and amniocentesis.

Last Answer : c) Chorionic villus sampling.

Down's Syndrome most often results from the presence of a third copy of which chromosome?

Description : Down's Syndrome most often results from the presence of a third copy of which chromosome?

Last Answer : ANSWER: CHROMOSOME 21

Webbed neck is a characteristic of (1) Down’s syndrome (2) Turner’s syndrome (3) Klinefelter’s syndrome (4) Cri–du–chat syndrome

Description : Webbed neck is a characteristic of (1) Down’s syndrome (2) Turner’s syndrome (3) Klinefelter’s syndrome (4) Cri–du–chat syndrome

Last Answer : Turner’s syndrome

People with Down’s syndrome invariably affected by: (1) Huntington’s disease (2) Alzheimer’s disease (3) Meningitis (4) Brain haemorrhage

Description : People with Down’s syndrome invariably affected by: (1) Huntington’s disease (2) Alzheimer’s disease (3) Meningitis (4) Brain haemorrhage

Last Answer : Alzheimer’s disease 

Trisomy 13?

Description : Trisomy 13?

Last Answer : DefinitionTrisomy 13 (also called Patau syndrome) is a genetic disorder in which a person has three copies of genetic material from chromosome 13, instead of the usual two copies. Rarely, the extra ... development.Trisomy 13 occurs in about 1 out of every 10,000 newborns. Most cases are not

Which one of the following conditions correctly describes the manner of determining the sex? (a) Homozygous sex chromosomes (ZZ) determine female sex in birds. (b) XO type of sex chromosomes determine male sex in grasshopper. (c) XO condition in humans as found in Turner’s syndrome, determines female sex. (d) Homozygous sex chromosomes (XX) produce male in Drosophila.

Description : Which one of the following conditions correctly describes the manner of determining the sex? (a) Homozygous sex chromosomes (ZZ) determine female sex in birds. (b) XO type of sex chromosomes ... s syndrome, determines female sex. (d) Homozygous sex chromosomes (XX) produce male in Drosophila.

Last Answer : (b) XO type of sex chromosomes determine male sex in grasshopper.

.A human female with Turner’s syndrome (a) has 45 chromosomes with XO (b) has one additional X chromosome (c) exhibits male characters (d) is able to produce children with normal husband.

Description : .A human female with Turner’s syndrome (a) has 45 chromosomes with XO (b) has one additional X chromosome (c) exhibits male characters (d) is able to produce children with normal husband.

Last Answer : (a) has 45 chromosomes with XO

In the hexaploid wheat, the haploid (n) and basic (x) numbers of chromosomes are (a) n = 21 and x = 21 (b) n = 21 and x = 14 (c) n = 21 and x = 7 (d) n = 7 and x = 21.

Description : In the hexaploid wheat, the haploid (n) and basic (x) numbers of chromosomes are (a) n = 21 and x = 21 (b) n = 21 and x = 14 (c) n = 21 and x = 7 (d) n = 7 and x = 21.

Last Answer : (c) n = 21 and x = 7

What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its root tip cells?a) 42b) 63c) 84d) 21

Description : What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its root tip cells?a) 42b) 63c) 84d) 21

Last Answer : b) 63

In Down’s cell, why the reaction between sodium metal and chlorine gas must be avoided? And how could we prevent reaction between them?

Description : In Down’s cell, why the reaction between sodium metal and chlorine gas must be avoided? And how could we prevent reaction between them?

Last Answer : Ans:In Down’s cell electrolysis of fused NaCl yields sodium metal and chlorine gas .If these are not separated these will react to form Nacl again. So to prevent these reaction in Down’s cell, we place a steel gauze between cathode and anode.