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Question
Explain the following terms:
Identical twins
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Solution
Identical twins - A single fertilized egg or Zygote splits into two parts after conception, resulting in the development of two individual embryos which later develop into indentical twins.
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RELATED QUESTIONS
Answer the following questions related to sex determination in human beings:
i. What is sex chromosome?
ii. How many pairs of chromosomes are present in human beings?
iii. How is the sex of the human offspring determined?
iv. Draw a diagram depicting sex determination in man.
There are two sets of chromosomes in the zygote.
Does genetic combination of mother play a significant role in determining the sex of a new born baby?
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 two versions of a trait (character) which are brought in by the male and female gametes are situated on :
(a) copies of the same chromosome
(b) sex chromosomes
(c) two different chromosomes
(d) any chromosomes
Explain the mechanism of sex determination in humans with a suitable chart.
A zygote which has an X-chromosome inherited from the father will develop into a ______.
A zygote which has an X-chromosome inherited from the father will develop into a
Also describe as to, who determines the sex of an unborn child? Mention whether temperature has a role in sex determination.
