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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
Fill in the following blank with suitable word :
Genes always work in ................ .
The exchange of genetic material takes place in :
(a) vegetative reproduction
(b) asexual reproduction
(c) sexual reproduction
(d) budding
Name any two genetic in humans.
Why did T. H. Morgan select Drosophila melanogaster to study sex linked genes for his lab experiments ?
Define the following:
Sex chromosomes
Explain the mechanism of sex determination in humans with a suitable chart.
Differentiate Intersexes from Supersexes.
Which of the following statements is not true with respect to variation?
The number of pair (s) of sex chromosomes in the zygote of humans is
What is sex determination? Explain the mechanism of sex determination in the case of birds.
