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प्रश्न
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उत्तर
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संबंधित प्रश्न
Write the types of sex-determination mechanisms the following crosses show. Give an example of each type.
(i) Female XX with Male XO
(ii) Female ZW with Male ZZ
How is the sex of the child determined in human beings?
Name the species used in sericulture. Name the stages in the life cycle of a silk moth in cyclic form.
Does genetic combination of mother play a significant role in determining the sex of a new born baby?
The exchange of genetic material takes place in :
(a) vegetative reproduction
(b) asexual reproduction
(c) sexual reproduction
(d) budding
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?
What is parthenogenesis?
A zygote which has an X-chromosome inherited from the father will develop into a
Which of the following statements is not true with respect to variation?
Which of the following group shows ZW-ZZ type of sex determination?
