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प्रश्न
What is parthenogenesis?
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उत्तर
The process by which a female produces offspring from unfertilized eggs is known as parthenogenesis.
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 sperm cell?
The number of pair(s) of sex chromosomes in the zygote of humans is ______.
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?
Explain the following terms:
Identical twins
How is sex determined in human beings?
Identify the female heterogamety from the chromosomal complements given below.
Identify the organism in which ZZ-ZW type of sex determination is observed.
The ‘X’ body of Henking was observed in ______.
Human offspring’s sex is determined ______
The two versions of a trait (character) which are brought in by the male and female gametes are situated on
The chromosomal constitution of a human female can be written as ______
Female heterogamy is shown by
Also describe as to, who determines the sex of an unborn child? Mention whether temperature has a role in sex determination.
Name the two types of gametes produced by men.
Does a male child inherit X chromosome from his father? Justify.
How is the sex of a newborn individual determined in different species of animals? Give three examples to support your answer.
Which of the following organisms exhibits the XX–XY sex determination system?
