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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
In a human, how many chromosmes are present in an egg which has just been produced by the ovary?
Define the following:
Sex chromosomes
Complete the following sentence with appropriate word:
___________ chromosomes do not take part in sex determination.
Write the functional activity of the following structure:
Heterosomes
Read the following statements and select the correct option.
i. If sperm containing Y chromosome fertilizes the ovum, then diploid zygote is formed that grows into a male child.
ii. If sperm containing X chromosome fertilizes ovum, then diploid zygote is formed, that grows into a female child.
Which of the following is an example of genetic variation?
If a normal cell of the human body contains 46 pairs of chromosomes then the numbers of chromosomes in a sex cell of a human being is most likely to be ______
What is sex determination? Explain the mechanism of sex determination in the case of birds.
Which biological mechanism establishes whether an individual develops as male or female based on genetic or chromosomal factors?
In 1891, H. Henking studied spermatogenesis in squash bugs and observed that a specific nuclear structure was present in what percentage of the resulting sperms?
