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प्रश्न
How drones are produced in honey bees?
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उत्तर
Through the process of parthenogenesis, drones are produced in honey bees.
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संबंधित प्रश्न
Which of the two, sperm or ovum, decides the sex of the child?
Why did T. H. Morgan select Drosophila melanogaster to study sex linked genes for his lab experiments ?
Choose the correct answer :
Human sex chromosomes are __________
XO type of sex determination and XY type of sex determination are examples of ____________.
Which of the following is incorrect regarding ZW-ZZ type of sex determination?
Read the following statements and select the correct option.
i. If sperm containing Y chromosome fertilizes the ovum, then diploid zygote is formed that grows into a male child.
ii. If sperm containing X chromosome fertilizes ovum, then diploid zygote is formed, that grows into a female child.
Grasshopper is an example of XO type of sex determination in which the males have ______.
The belief that the mother is completely responsible for the sex of the child is wrong because the child
All human chromosomes ate not paired. Most human chromosomes have a maternal and a paternal copy, and we have 22 such pairs. But one pair called the sex chromosomes, is odd in not always being a perfect pair. Women have a perfect pair of sex chromosomes. But men have a mismatched pair in which one is normal sized while the other is a short one.
(a) In humans, how many chromosomes are present in a Zygote and in each gamete?
(b) A few reptiles rely entirely on environmental cues for sex determination. Comment.
(c) "The sex of a child is a matter of chance and none of the parents are considered to be responsible for it." Justify it through flow chart only.
OR
(c) Why do all the gametes formed in human females have an X chromosome?
The sex chromosome in a human ovum is ______.
