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A normal cell of human body contains 23 pairs of chromosomes. The number of chromosomes in a sex cell (sperm or ovum) of a human being is most likely to be :
(a) 46
(b) 23
(c) 21
(d) 42
E is the gene for brown eye colour and an is the gene for blue eye colour. which gene is (1) recessive, and (2) dominant?
Name any two genetic in humans.
Choose the correct answer:
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With the help of a chart, explain the method of sex determination in honeybees.
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Sex is determined in human beings ______.
The ‘X’ body of Henking was observed in ______.
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