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प्रश्न
Which of the following combinations of sex chromosomes produce a male child : XX or XY?
उत्तर
Combination XY of sex chromosomes produces a male child.
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संबंधित प्रश्न
How is the sex of the child determined in human beings?
If a normal human cell has 46 chromosomes, how many chromosomes will be there in a human (i) sperm cell, and (ii) zygote?
In a human, how many chromosmes are present in a sperm in the testes?
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
The exchange of genetic material takes place in :
(a) vegetative reproduction
(b) asexual reproduction
(c) sexual reproduction
(d) budding
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?
Brief about female heterogamety.
From the following which option correctly represents the normal genetic constitution of a ovum?
Sex in honey bee is determined by ______.
Female heterogamy is shown by
