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प्रश्न
How many types of gametes are produced by a human female?
उत्तर
An ovum, which carries the X chromosome, is the only form of gamete that a human female can produce.
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संबंधित प्रश्न
If X chromosome is inherited from mother and Y from father, the offspring will be male.
The number of pair(s) of sex chromosomes in the zygote of humans is :
(a) one
(b) two
(c) three
(d) four
The person A has only B chromosomes in all its gametes. On the other hand, another person C has chromosome D in half of gametes and chromosome E in the other half of gametes. When chromosomes B and D combine during fertilisation, a female zygote results. On the other hand, combination of B and E chromosomes produces a male zygote.
(a) What are chromosomes (i) B (ii) D, and (iii) E?
(b) Out of B, D and E, which two chromosomes are of the same type?
(c) Which chromosome is smaller in size?
(d) What is the general name of chromosomes such as B and E?
(e) Out of the two persons A and C, which one is (i) male, and (ii) female?
Why did T. H. Morgan select Drosophila melanogaster to study sex linked genes for his lab experiments ?
What is heterogamety ? Explain the mechanism of sex determinatin in Drosophila.
Explain the mechanism of sex determination in humans with a suitable chart.
How is sex determined in human beings?
Identify the female heterogamety from the chromosomal complements given below.
A zygote which has an X-chromosome inherited from the father will develop into a ______.
Human offspring’s sex is determined ______
