(a) If a normal human cell has 46 chromosomes, how many chromosomes will be there in a human: (i) Sperm (ii) Zygote (b) Name an animal in which individuals can change sex. What does this indicate? -Science

1 Answer

Answer :

(a) A normal human being has 46 chromosomes in which 23 chromosomes come from males and 23 chromosomes come from female. (i) Sperms coming from males have 23 chromosomes. (ii) Zygote forming in the womb of a woman has 46 chromosomes in all. (b) Snail. This indicates that sex is not determined genetically in such animals.

Related questions

Description : An abnormal human baby with ‘XXX’ sex chromosomes was born due to (a) fusion of two ova and one sperm (b) fusion of two sperms and one ovum (c) formation of abnormal sperms in the father (d) formation of abnormal ova in the mother.

Last Answer : (d) formation of abnormal ova in the mother.

Description : If a normal human cell has 46 chromosomes how many chromosomes will its daughter cell have?

Last Answer : Need answer

Description : What is the number of chromosomes in a normal human body cell? (1) 43 (2) 44 (3) 45 (4) 46

Last Answer : (4) 46 Explanation: A chromosome is an organized structure of DNA and protein found in cells. It is a single piece of coiled DNA containing many genes, regulatory elements and other nucleotide sequences. ... (22 pairs of autosomes and one pair of sex chromosomes), giving a total of 46 per cell.

Description : What is the number of chromosomes in a normal human body cell ? (1) 43 (2) 44 (3) 45 (4) 46

Last Answer : 46

Description : What are the normal chromosome numbers of a sperm egg and zygote respectively?

Last Answer : monoploid, monoploid and diploid

Description : The number of chromosomes present in normal human being are - (1) 23 (2) 46 (3) 22 (4) 48

Last Answer : (2) 46 Explanation: A chromosomeis an organized structure of DNA and protein found in cells. It is a single piece of coiled DNA containing many genes, regulatory elements and other nucleotide sequences. ... genetic traits are linked to a person's sex and are passed on through the sex chromosomes.

Description : The number of chromosomes present in normal human being are (1) 23 (2) 46 (3) 22 (4) 48

Last Answer : 46

Description : Each new sex cell is called a. Gamete b. embryo c. zygote d. -----

Last Answer : Gamete

Description : In normal human sex cells contain the number of chromosomes?

Last Answer : I'm guessing you mean germ cells (oocyte and sperm). Each onehas 23 chromosomes (haploid), so when they fuse they make a fullcell (46 chromosomes-diplod).

Description : The human cell contains (a) 44 chromosomes (b) 48 chromosomes (c) 46 chromosomes (d) 23 chromosomes

Last Answer : Ans:(c)

Description : A human somatic cell has 46 chromosomes. How many chromosomes are in a human gamete?

Last Answer : 23

Description : The number of chromosomes present in the somatic cell of the human cell is - (1) 23 (2) 44 (3) 46 (4) 92

Last Answer : (3) 46 Explanation: Human cells have 23 pairs of chromosomes (22 pairs of autosomes and one pair of sex chromosomes), giving a total of 46 per cell.

Description : The number of chromosomes present in the somatic cell of the human cell is (1) 23 (2) 44 (3) 46 (4) 92

Last Answer : 46

Description : In man, the normal number of chromosomes is - (1) 42 (2) 44 (3) 46 (4) 48

Last Answer : (3) 46 Explanation: Chromosomes are the structures that hold our genes. Genes are the individual instructions that tell our bodies how to develop and function; they govern our physical and medical ... the egg), and the other set is inherited from the biological father (from the sperm).

Description : In man, the normal number of chromosomes is (1) 42 (2) 44 (3) 46 (4) 48

Last Answer : 46

Description : Identical twins are born when (a) Two sperms fertilise one ovum (b) Two sperms fertilise two ovums simultaneously (c) Open sperm fertilizes the ovum and zygote divides into two separate cells developing independently (d) One sperm fertilises two ovums

Last Answer : Ans:(c)

Description : What would be the ratio of chromosome number between an egg and its zygote? How is the sperm genetically different from the egg? -Biology

Last Answer : The ratio of chromosome number between egg· and its zygote is 1 : 2. An egg is a female gamete, it has haploid number of chromosomes. ... Sperms and eggs are genetically different in terms ... chromosome. The sperm contain either X or Y-chromosome whereas an egg will always have an X-chromosome.

Description : After the union of sperm and egg, the single-celled zygote develops into a multicellular organism with specialized cells by the processes of?

Last Answer : mitosis and diffrentiation

Description : The test-tube baby programme employs which one of the following techniques? (a) Intra Cytoplasmic Sperm Injection (ICSI) (b) Intra Uterine Insemination (IUI) (c) Gamete Intra Fallopian Transfer (GIFT) (d) Zygote Intra Fallopian Transfer (ZIFT)

Last Answer : (d) Zygote Intra Fallopian Transfer (ZIFT)

Description : Meiotic division of the secondary oocyte is completed (a) prior to ovulation (b) at the time of copulation (c) after zygote formation (d) at the time of fusion of a sperm with an ovum.

Last Answer : (d) at the time of fusion of a sperm with an ovum.

Description : 88. The Test-tube Baby Programme employs which one of the following techniques ? (1) Zygote intra fallopian transfer (ZIFT) (2) Intra cytoplasmic sperm injection (ICSI) (3) Intra uterine insemination (IUI) (4) Gamete intra fallopian transfer (GIFT)

Last Answer : ) Zygote intra fallopian transfer (ZIFT)

Description : In tobacco plant, the male gametes have twenty four chromosomes. What is the number of chromosomes in the female gamete? What is the number of chromosomes in the zygote? -Biology

Last Answer : The number of chromosome in the female gamete would be same as that in the male gamete, i.e., it will have 24 chromosomes. The number of chromosome in the zygote would be double the number present in the gamete and hence, it would be 48.

Description : How wide is the zygote carrying chromosomes ?

Last Answer : The zygote carries two broad chromosomes.

Description : Somatic cells of a human have ____ chromosomes and are called (A) 10, haploid (B) 92, diploid (C) 23, haploid (D) 46, diploid

Last Answer : (D) 46, diploid

Description : A cell has 46 chromosomes at each pole in mitotic telophase. In tis division the number of chromatids at the metaphase was :-

Last Answer : A cell has 46 chromosomes at each pole in mitotic telophase. In tis division the number of chromatids at the metaphase was :- A. 23 B. 46 C. 92 D. 69

Description : If the original cell has 46 chromosomes how can each daughter cell also have 46 chromosomes?

Last Answer : Feel Free to Answer

Description : . Select the incorrect statement. (a) Human males have one of their sex-chromosome much shorter than other. (b) Male fruit fly is heterogametic. (c) In male grasshoppers, 50% of sperms have no sex-chromosome. (d) In domesticated fowls, sex of progeny depends on the type of sperm rather than egg.

Last Answer : (d) In domesticated fowls, sex of progeny depends on the type of sperm rather than egg.

Description : If an egg cell contains 50 chromosomes how many chromosomes are in sperm cell from the same species?

Last Answer : 50

Description : Meiosis II performs (a) separation of sex chromosomes (b) synthesis of DNA and centromere (c) separation of homologous chromosomes (d) separation of chromatids.

Last Answer : d) separation of chromatids.

Description : How are sex chromosomes of human males and females alike How are they different?

Last Answer : Need answer

Description : How many chromosomes does a elephant have in a sex cell?

Last Answer : Need answer

Description : Allosomes are (1) cell organelles (2) plant hormones (3) alleles (4) sex chromosomes

Last Answer : sex chromosomes

Description : Draw a diagrammatic sectional view of human ovary showing different stages of oogenesis along with corpus luteum. (ii) Where is morula formed in human? Explain the process of its development from zygote. -Biology

Last Answer : (i) Sectional view of human ovary. (ii) Morula is formed in the (a)Isthmus of the oviduct (Fallopiantube). (b)The zygote undergoes mitotic divisions in quick succession called cleavage, forming 2, 4 ... 8-16 blastomeres is called a morula and the inner cell mass gets ready to form the embryo proper.

Description : (i)Explain the events taking place at the time of fertilisation of an ovum in a human female. (ii)Trace the development of the zygote up to its implantation in the uterus. (iii)Name and draw a labelled sectional view of the embryonic stage that gets implanted. -Biology

Last Answer : (i)In humans, the fertilisation of ovum takes place in ampullary-isthmic junction of Fallopian tube. The events that occur during the process of fertilisation are: (a) The sperm reaches the ... endometrium of the uterus. This is called implantation.(iii) Blastocyst stage implants in the uterus.

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.

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

Description : When sex is done the sperm and seaman is in vagina what would be the DNA mac hing sapling?

Last Answer : Dna education

Description : In our society women are blamed for producing female children. Choose the correct answer for the sex-determination in humans. (a) Due to some defect like aspermia in man. (b) Due to the genetic make up of the ... . (c) Due to the genetic make up of the egg. (d) Due to some defect in the women.

Last Answer : (b) Due to the genetic make up of the particular sperm which fertilises the egg.

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.

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

Description : Under section 46 of IPC, death denotes (a) Death of a human being (b) Death of an animal (c) Death of a human being and of an animal both (d) Death of either human being or an animal.

Last Answer : (a) Death of a human being

Description : Do echinoderms present internal or external fecundation? Is there sex division among individuals?

Last Answer : The fecundation in echinoderms is external, gametes are liberated in water where fecundation occurs. The majority of echinoderms are dioecious with male and female individuals.

Description : Which best describes the sex chromosomes in humans?

Last Answer : Humans have 22 pairs of homologous non-sex chromosomes (called autosomes), and one pair of sex chromosomes, making a total of 46 chromosomes in a genetically normal human.Each member of a pair is inherited ... a homologous pair of sex chromosomes (two Xs), while males have an X and a Y chromosome.

Description : How many sex chromosomes ?

Last Answer : Two sex chromosomes.

Description : How many pairs of sex chromosomes ?

Last Answer : 1 pair of sex chromosomes

Description : $ The term chromosome was introduced by Waldeyer. ! Sex chromosomes are also called Heterosomes.

Last Answer : $ The term chromosome was introduced by Waldeyer. ! Sex chromosomes are also called Heterosomes. A. If both ... wrong D. If both As and R are wrong.

Description : If a naked mole rat has 27 chromosomes in its sex cellshow many chromosomes would it have in its body cells?

Last Answer : Need answer

Description : Why is it important that sex cells have half the numbers as chromosomes as body as body cells?

Last Answer : This happens so the genetic material from both parents combinesto make new set.

Description : What Traits controlled by genes located on sex chromosomes are what kind of traits?

Last Answer : If a gene is found on the X chromosome (and, less commonly onthe Y chromosome), it is said to be asex-linked trait.There are about 1,098 human X-linked genes. Most of them codefor ... blindness.X-linked genes are also responsible for a common form ofbaldness referred to as "male pattern baldness".

Description : What chromosomes determine the sex of the child?

Last Answer : the males X and Y chromosomes and the females X chromosomes