What is a cell that only has one copy of each chromosome?

What is a cell that only has one copy of each chromosome?
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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%

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

Assertion:- A single human cell has approximately two meter long thread of DNA distributed in each chromosome. Reason:- Durring different stages of ce

Description : Assertion:- A single human cell has approximately two meter long thread of DNA distributed in each chromosome. Reason:- Durring different stages of ce

Last Answer : Assertion:- A single human cell has approximately two meter long thread of DNA distributed in each ... D. If both Assertion & Reason are false.

In ‘S’ phase of the cell cycle (a) amount of DNA doubles in each cell (b) amount of DNA remains same in each cell (c) chromosome number is increased (d) amount of DNA is reduced to half in each cell.

Description : In ‘S’ phase of the cell cycle (a) amount of DNA doubles in each cell (b) amount of DNA remains same in each cell (c) chromosome number is increased (d) amount of DNA is reduced to half in each cell.

Last Answer : (a) amount of DNA doubles in each cell

At the beginning of which phase of mitosis does each duplicated and condensed chromosome consisting of two identical sister chromatids align along the cell equator?

Description : At the beginning of which phase of mitosis does each duplicated and condensed chromosome consisting of two identical sister chromatids align along the cell equator?

Last Answer : Metaphase

.Which one of the following conditions of the zygotic cell would lead to the birth of a normal human female child? (a) Two X chromosomes (b) Only one Y chromosome (c) Only one X chromosome (d) One X and one Y chromosome

Description : .Which one of the following conditions of the zygotic cell would lead to the birth of a normal human female child? (a) Two X chromosomes (b) Only one Y chromosome (c) Only one X chromosome (d) One X and one Y chromosome

Last Answer : (a) Two X chromosomes

How does a cell makes sure that each daughter cell has a complete copy of the DNA?

Description : How does a cell makes sure that each daughter cell has a complete copy of the DNA?

Last Answer : Need answer

Which of these is a quick way to copy formatting from a selected cell to two other cells on the same worksheet? 1) Use CTRL to select all three cells, then click the Paste Button image button on the Standard toolbar 2) Copy the selected cell, then select the other two cells, click Style on the Format menu, then click Modify 3) Click Format Painter Button image on the Formatting toolbar twice, then click in each cell you want to copy the formatting to 4) Use Alt to select all three cells, then click the Paste Button image button on the Standard toolbar

Description : Which of these is a quick way to copy formatting from a selected cell to two other cells on the same worksheet? 1) Use CTRL to select all three cells, then click the Paste Button image button ... ) Use Alt to select all three cells, then click the Paste Button image button on the Standard toolbar

Last Answer : 3) Click Format Painter Button image on the Formatting toolbar twice, then click in each cell you want to

What is the number of chromosome in a normal human body cell? -Do You Know?

Description : What is the number of chromosome in a normal human body cell? -Do You Know?

Last Answer : 46 chromosomes Humans have 23 pairs of chromosomes, for a total of 46 chromosomes

Put the following structures in order from smallest to biggest, Chromosome, Genome, Nucleotide Base, Codon, Gene, Cell Nucleus?

Description : Put the following structures in order from smallest to biggest, Chromosome, Genome, Nucleotide Base, Codon, Gene, Cell Nucleus?

Last Answer : The order is nitrogenous base, nucleotide, codon, gene, chromosome, nucleus, and cell. :)

At what stage of mitosis cell division does half of the chromosome move towards the North Pole and half towards the South Pole ?

Description : At what stage of mitosis cell division does half of the chromosome move towards the North Pole and half towards the South Pole ?

Last Answer : Answer : In the anaphase stage of mitosis cell division, half of the chromosomes move towards the North Pole and half towards the South Pole.

Assertion :- Kinetochore is essential for cell division. Reason :- Kinetochores serve as the sites of attachment of spindle fibres to the chromosome.

Description : Assertion :- Kinetochore is essential for cell division. Reason :- Kinetochores serve as the sites of attachment of spindle fibres to the chromosome.

Last Answer : Assertion :- Kinetochore is essential for cell division. Reason :- Kinetochores serve as the sites of ... D. If both Assertion & Reason are false.

The number of DNA in chromosome at `G_(2)` stage of cell cycle

Description : The number of DNA in chromosome at `G_(2)` stage of cell cycle

Last Answer : The number of DNA in chromosome at `G_(2)` stage of cell cycle A. One B. Two C. Four D. Eight

During cell division, spindle fibers attach to which part of chromosome :-

Description : During cell division, spindle fibers attach to which part of chromosome :-

Last Answer : During cell division, spindle fibers attach to which part of chromosome :- A. Primary constriction B. Sec. Constriction C. Chromomere D. Chromatid

How many chromosome shal be present in a diploid cell at mitotic anaphase if its egg cell has the chromosome :-

Description : How many chromosome shal be present in a diploid cell at mitotic anaphase if its egg cell has the chromosome :-

Last Answer : How many chromosome shal be present in a diploid cell at mitotic anaphase if its egg cell has the chromosome ... 20(Twenty) C. 30(Thirty) D. 40(Forty)

Which type of chromosome is present in the prophase of cell cycle?

Description : Which type of chromosome is present in the prophase of cell cycle?

Last Answer : Which type of chromosome is present in the prophase of cell cycle? A. 2 chromatid B. 1 chromatid C. 4 chromatid D. 8 chromatid

A cell examined during prophase of cell cycle contained 100 units of DNA and 50 chromosomes. What would be the number of DNA and chromosome in anaphas

Description : A cell examined during prophase of cell cycle contained 100 units of DNA and 50 chromosomes. What would be the number of DNA and chromosome in anaphas

Last Answer : A cell examined during prophase of cell cycle contained 100 units of DNA and 50 chromosomes. What ... & 100 chromosomes D. 50 DNA & 25 chromosomes

What is A cell or organism having half of the diploid chromosome number?

Description : What is A cell or organism having half of the diploid chromosome number?

Last Answer : Need answer

Mitosis is a type of cell division in which - (1) The chromosomes maintain their original number (2) The chromosome number is reduced to half (3) The Chromosome number is doubled (4) The chromosome number is reduced to one fourth

Description : Mitosis is a type of cell division in which - (1) The chromosomes maintain their original number (2) The chromosome number is reduced to half (3) The Chromosome number is doubled (4) The chromosome number is reduced to one fourth

Last Answer : (3) The Chromosome number is doubled

Which of the following is called the powerhouse' of the cell? (1) Nucleus (2) Lysosome (3) Chromosome (4) Mitochondrion

Description : Which of the following is called the powerhouse' of the cell? (1) Nucleus (2) Lysosome (3) Chromosome (4) Mitochondrion

Last Answer : (4) Mitochondrion Explanation: Mitochondria are sometimes described as "cellular power plants" because they generate most of the cell's supply of adenosine tri-phosphate (ATP), used as a source of ... cellular differentiation, cell death, as well as the control of the cell cycle and cell growth.

In which cell division chromosome num- ber is reduced to half?

Description : In which cell division chromosome num- ber is reduced to half?

Last Answer : Meiosis

Which cell division helps to maintain the chromosome number of a species?

Description : Which cell division helps to maintain the  chromosome number of a species?

Last Answer : Meiosis

Production of a human protein in bacteria by genetic engineering is possible because (a) the human chromosome can replicate in bacterial cell (b) the mechanism of gene regulation is identical in humans and bacteria (c) bacterial cell can carry out the RNA splicing reactions (d) the genetic code is universal.

Description : Production of a human protein in bacteria by genetic engineering is possible because (a) the human chromosome can replicate in bacterial cell (b) the mechanism of gene regulation is identical in ... ) bacterial cell can carry out the RNA splicing reactions (d) the genetic code is universal.

Last Answer : (d) the genetic code is universal.

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

Select the correct match. (a) Haemophilia – Y linked (b) Phenylketonuria – Autosomal dominant trait(c) Sickle cell anaemia – Autosomal recessive trait,chromosome -11 (d) Thalassemia – X linked

Description : Select the correct match. (a) Haemophilia – Y linked (b) Phenylketonuria – Autosomal dominant trait (c) Sickle cell anaemia – Autosomal recessive trait,chromosome -11 (d) Thalassemia – X linked

Last Answer : (c) Sickle cell anaemia – Autosomal recessive trait,chromosome -11

Genetic identity of a human male is determined by (a) sex-chromosome (b) cell organelles (c) autosome (d) nucleolus.

Description : Genetic identity of a human male is determined by (a) sex-chromosome (b) cell organelles (c) autosome (d) nucleolus.

Last Answer : a) sex-chromosome

A fruit fly is heterozygous for sex-linked genes, when mated with normal female fruit fly, the males specific chromosome will enter egg cell in the proportion (a) 3 : 1 (b) 7 : 1 (c) 1 : 1 (d) 2 : 1.

Description : A fruit fly is heterozygous for sex-linked genes, when mated with normal female fruit fly, the males specific chromosome will enter egg cell in the proportion (a) 3 : 1 (b) 7 : 1 (c) 1 : 1 (d) 2 : 1.

Last Answer : (c) 1 : 1

Anaphase Promoting Complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cell. If APC is defective in a human cell, which of the following is expected to occur? (a) Chromosomes will be fragmented. (b) Chromosomes will not segregate. (c) Recombination of chromosome arms will occur. (d) Chromosomes will not condense

Description : Anaphase Promoting Complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cell. If APC is defective in a human cell, which of the following is expected to ... will not segregate. (c) Recombination of chromosome arms will occur. (d) Chromosomes will not condense

Last Answer : (b) Chromosomes will not segregate.

When a viral nucleic acid becomes part of the host cell chromosome it is called _____. a. lysis b. lysogeny c. maturation d. latent

Description : When a viral nucleic acid becomes part of the host cell chromosome it is called _____. a. lysis b. lysogeny c. maturation d. latent

Last Answer : b. lysogeny

Which of the following statements supports the cell theory? a. all living things are made of cells b. all living things have a chromosome in the nucleus c. all living things have cellular metabolism in the mitochondria d. A-C are correct

Description : Which of the following statements supports the cell theory? a. all living things are made of cells b. all living things have a chromosome in the nucleus c. all living things have cellular metabolism in the mitochondria d. A-C are correct

Last Answer : a. all living things are made of cells

What is the number of chromosome in a normal human body cell?

Description : What is the number of chromosome in a normal human body cell?

Last Answer : 46

2. A human cell containing 22 autosomes and a Y chromosome is probably a a) somatic cell of male b) sperm cell c) somatic cell of female d) unfertilized egg cell

Description : 2. A human cell containing 22 autosomes and a Y chromosome is probably a a) somatic cell of male b) sperm cell c) somatic cell of female d) unfertilized egg cell

Last Answer : b) sperm cell

Anaphase Promoting Complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur ? (1) Chromosomes will be fragmented (2) Chromosomes will not segregate (3) Recombination of chromosome arms will occur (4) Chromosomes will not condense

Description : Anaphase Promoting Complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur ... will not segregate (3) Recombination of chromosome arms will occur (4) Chromosomes will not condense

Last Answer : (2) Chromosomes will not segregate

In a cell haploid chromosome number is 15. What number is found in Pollen grain, Zygote, Primary endosperm nucleus and Colchicine treated zygote.

Description : In a cell haploid chromosome number is 15. What number is found in Pollen grain, Zygote, Primary endosperm nucleus and Colchicine treated zygote. 

Last Answer : Ans: 15 in pollen grain, 30 in zygote, 45 in Primary Endosperm nucleus and 60 in colchicine treated zygote.

This female American geneticist achieved recognition as one of the world's foremost investigators in cytogenetics, the study of heredity by cellular and genetic methods. In 1951 she discovered that gene fragments in corn could move from chromosome to chromosome, and even from cell to cell. Thirty-two years after this extraordinary work, she was awarded the Nobel Prize in medicine in 1983. Who is this notable woman scientist?

Description : This female American geneticist achieved recognition as one of the world's foremost investigators in cytogenetics, the study of heredity by cellular and genetic methods. In 1951 she discovered that gene ... was awarded the Nobel Prize in medicine in 1983. Who is this notable woman scientist?

Last Answer : ANSWER: (BARBARW) McCLINTOCK

Which of the following is called the powerhouse’ of the cell ? (1) Nucleus (2) Lysosome (3) Chromosome (4) Mitochondrion

Description : Which of the following is called the powerhouse’ of the cell ? (1) Nucleus (2) Lysosome (3) Chromosome (4) Mitochondrion

Last Answer : Mitochondrion

At what stage do each chromosome split vertically to form two chromatids ?

Description : At what stage do each chromosome split vertically to form two chromatids ?

Last Answer : Each chromosome splits vertically to form two chromatids in the prophase step.

Human body Each In the body cells How much? Pairs Chromosome Stay ?

Last Answer : of the human body Each 23 pairs in body cells Chromosome Stays

Assertion :- Each chromatid is attached with two spindle fibres during S-phase :- Reason :- During Anaphse-I each chromosome is found in bivalent form

Description : Assertion :- Each chromatid is attached with two spindle fibres during S-phase :- Reason :- During Anaphse-I each chromosome is found in bivalent form

Last Answer : Assertion :- Each chromatid is attached with two spindle fibres during S-phase :- Reason :- During ... . D. If both Assertion & Reason are false.

Assertion :- In anaphase number of chromosomes get doubled. Durring anaphase each chromosome split simultaneously and two daughter chromatids now refe

Description : Assertion :- In anaphase number of chromosomes get doubled. Durring anaphase each chromosome split simultaneously and two daughter chromatids now refe

Last Answer : Assertion :- In anaphase number of chromosomes get doubled. Durring anaphase each chromosome split ... If both Assertion & Reason are false.

Each chromosome composed of one chromatid in:-

Description : Each chromosome composed of one chromatid in:-

Last Answer : Each chromosome composed of one chromatid in:- A. Anaphase-I B. Anaphase-II C. Metaphae-I D. Metaphase-II

At anaphase -II of meiosis each chromosome contains:-

Description : At anaphase -II of meiosis each chromosome contains:-

Last Answer : At anaphase -II of meiosis each chromosome contains:- A. 4 DNA B. 3- DNA C. 2- DNA D. 1- DNA

When each chromosome gets pulled apart during anaphase of mitosis each half of each chromosome is what?

Description : When each chromosome gets pulled apart during anaphase of mitosis each half of each chromosome is what?

Last Answer : Feel Free to Answer

What is a Segment of a chromosome that controls each characteristic called?

Description : What is a Segment of a chromosome that controls each characteristic called?

Last Answer : What is the answer ?

A gene showing co-dominance has (a) alleles that are recessive to each other (b) both alleles independently expressed in the heterozygote (c) one allele dominant on the other (d) alleles tightly linked on the same chromosome.

Description : A gene showing co-dominance has (a) alleles that are recessive to each other (b) both alleles independently expressed in the heterozygote (c) one allele dominant on the other (d) alleles tightly linked on the same chromosome.

Last Answer : (b) both alleles independently expressed in the heterozygote

Each chromosome consists of two identical (A) Genes (B) Nuclei (C) Chromatids (D) Bases

Description : Each chromosome consists of two identical (A) Genes (B) Nuclei (C) Chromatids (D) Bases

Last Answer : (C) Chromatids

Can anyone tell m were the actual chromosome multiplication takes place during mitosis... The ncert book mentions only dna -Biology

Description : Can anyone tell m were the actual chromosome multiplication takes place during mitosis... The ncert book mentions only dna -Biology

Last Answer : answer:

Which vector can clone only a small fragment of DNA? (a) Bacterial artificial chromosome (b) Yeast artificial chromosome (c) Plasmid (d) Cosmid

Description : Which vector can clone only a small fragment of DNA? (a) Bacterial artificial chromosome (b) Yeast artificial chromosome (c) Plasmid (d) Cosmid

Last Answer : (c) Plasmid

True statements about chromosome include: a. 23 chromosomes are found in germinal cells b. in female only one chromosome is activated c. the Barr body is due to inactivated X chromosome e. all above

Description : True statements about chromosome include: a. 23 chromosomes are found in germinal cells b. in female only one chromosome is activated c. the Barr body is due to inactivated X chromosome e. all above

Last Answer : all above

A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by (a) only daughters (b) only sons (c) only grandchildren (d) both sons and daughters

Description : A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by (a) only daughters (b) only sons (c) only grandchildren (d) both sons and daughters

Last Answer : (d) both sons and daughters.