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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 the types of sex-determination mechanisms the following crosses show. Give an example of each type.
(i) Female XX with Male XO
(ii) Female ZW with Male ZZ
Explain the mechanism of sex determination in birds.
Both father and mother have the genes Ee in their cells. What colour are their eyes?
What is heterogamety ? Explain the mechanism of sex determinatin in Drosophila.
Complete the following sentence with appropriate word:
___________ chromosomes do not take part in sex determination.
Explain the haplo-diploid method of sex determination in the honey bee.
Haplodiploidy is found in ______.
Does a male child inherit X chromosome from his father? Justify.
Which pair of sex chromosome will determine a male?
In the haplodiploidy system observed in honeybees, unfertilized eggs develop into which type of individual?
