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प्रश्न
ZW-ZZ system of sex determination occurs in
विकल्प
Fishes
Reptiles
Birds
All of these
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उत्तर
All of these
संबंधित प्रश्न
How is the sex of the child determined in human beings?
The exchange of genetic material takes place in :
(a) vegetative reproduction
(b) asexual reproduction
(c) sexual reproduction
(d) budding
Why did T. H. Morgan select Drosophila melanogaster to study sex linked genes for his lab experiments ?
________ shows haplo-diploid type of sex-determination.
Drone of the honeybees shows haploid number of chromosomes. Illustrate.
Which of the following combination of chromosome numbers represents the correct sex determination pattern in honey bees?
The number of pairs of sex chromosomes in the zygote of a human being is ______
A zygote which has an X-chromosome inherited from the father will develop into a
Select the incorrect statement
All human chromosomes ate not paired. Most human chromosomes have a maternal and a paternal copy, and we have 22 such pairs. But one pair called the sex chromosomes, is odd in not always being a perfect pair. Women have a perfect pair of sex chromosomes. But men have a mismatched pair in which one is normal sized while the other is a short one.
(a) In humans, how many chromosomes are present in a Zygote and in each gamete?
(b) A few reptiles rely entirely on environmental cues for sex determination. Comment.
(c) "The sex of a child is a matter of chance and none of the parents are considered to be responsible for it." Justify it through flow chart only.
OR
(c) Why do all the gametes formed in human females have an X chromosome?
