Advertisements
Advertisements
प्रश्न
Explain the mechanism of sex determination in birds.
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
Which of the two, sperm or ovum, decides the sex of the child?
In a human, how many chromosmes are present in an egg which has just been produced by the ovary?
Does genetic combination of mother play a significant role in determining the sex of a new born baby?
Differentiate Intersexes from Supersexes.
Which type of sex determination is observed in honey bee?
Number of autosomes present in liver cells of a human female is ______.
Human offspring’s sex is determined ______
The maleness of a child is determined by ______
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 ______
Which of the following determines the sex of a child?
