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प्रश्न
Explain the mechanism of sex determination in birds.
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उत्तर
- In birds, the chromosomal mechanism of sex determination is ZW-ZZ type.
- In this type females are heterogametic and produce two types of eggs; 50% of eggs carry Z-chromosome, while 50% of eggs carry W- chromosome.
- Males are homogametic and produce one type of sperms. Each sperm carries a Z chromosome.
- Thus, the sex of an individual depends on the kind of egg (ova) fertilized by the sperm.
संबंधित प्रश्न
Write notes on sex determination in the unborn baby.
A zygote which has inherited an X chromosome from the father will develop into :
(a) baby boy
(b) baby girl
(c) adult
(d) either boy or girl
Explain the following terms:
Identical twins
Explain the mechanism of sex determination in humans with a suitable chart.
Which type of sex determination is observed in honey bee?
Identify the organism in which ZZ-ZW type of sex determination is observed.
The number of pair (s) of sex chromosomes in the zygote of humans is
Structures present in a cell which is responsible for determination of the sex of a baby is ______.
The chromosomal constitution of a human female can be written as ______
Does a male child inherit X chromosome from his father? Justify.
