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प्रश्न
Explain the mechanism of 'sex determination' in birds. How does it differ from that of human beings?
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उत्तर
- The sex chromosomes in birds are determined as Z and W. The male is homomorphic (ZZ) and the female is heteromorphic (ZW).
- W chromosome carries female sex-determining genes and duplication of Z chromosome indicates male sex.
- So, in case of chicks, the sex is determined by the egg and not by the sperms.
- The difference between sex mechanisms of humans.
- birds is that the male is homomorphic (ZZ) and the female is heteromorphic (ZW) in birds, whereas the male is heteromorphic (XY) and female is homomorphic (XX) in humans.
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संबंधित प्रश्न
Define the following:
Autosomes
Choose the correct answer :
Human sex chromosomes are __________
Identify the female heterogamety from the chromosomal complements given below.
From the following which option correctly represents the normal genetic constitution of a ovum?
Number of autosomes present in liver cells of a human female is ______.
Grasshopper is an example of XO type of sex determination in which the males have ______.
Which of the following determines the sex of a child?
The number of pair (s) of sex chromosomes in the zygote of humans is
The belief that the mother is completely responsible for the sex of the child is wrong because the child
Sex in honey bee is determined by ______.
