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प्रश्न
A woman has only daughters. Analyse the situation genetically and provide a suitable explanation.
उत्तर
In humans, women produce one type of eggs (all with X chromosome) and men produce two types of sperms - 50% with X chromosome and 50% with Y chromosome. All the children of a woman receive X chromosome from her but second sex chromosome which is received from father, can be X or Y. So, the sex is determined by the sex chromosome present in the sperms of the father. If a woman has only daughters, it means father has contributed sperm with X chromosome.
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संबंधित प्रश्न
The number of pair(s) of sex chromosomes in the zygote of humans is :
(a) one
(b) two
(c) three
(d) four
Give Reason:
Why X-linked recessive diseases are more common among males than females.
How drones are produced in honey bees?
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.
XO type of sex determination and XY type of sex determination are examples of ____________.
ZW-ZZ system of sex determination occurs in
Which of the following organisms has haploid number of chromosomes?
Which of the following determines the sex of a child?
Which of the following statements is not true with respect to variation?
Sex in honey bee is determined by ______.
