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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
A new born child has an XY pair of chromosmes. Will it be a baby boy or a baby girl?
Choose the correct answer:
Chromosomes identical in male and female are called __________
Drone of the honeybees shows haploid number of chromosomes. Illustrate.
Give Reason:
Why X-linked recessive diseases are more common among males than females.
Short Answer Question.
“Father is responsible for determination of sex of child and not the mother”. Justify.
Kavitha gave birth to a female baby. Her family members say that she can give birth to only female babies because of her family history. Is the statement given by her family members true? Justify your answer.
Structures present in a cell which is responsible for determination of the sex of a baby is ______.
How many types of gametes are produced by a human female?
Twins are born to a family that lives next door to you. The twins are a boy and a girl. Which of the following must be true?
