Question 20
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) two different chromosomes
(c) sex chromosomes
(d) any chromosome

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Solution

(a) copies of the same chromosome

The two versions of a trait are situated on copies of the same chromosome. Each parent contributes one copy of the gene for a particular character. In the gamete, however, only one copy is present. After fusion, the nucleus of cell contains two complete sets of chromosomes, one set inherited from each parent (diploid condition). Sex chromosomes carry genes for sexual characters.

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Q. The two versions of a trait (character), which are brought in by the male and female gametes are situated on____________

Q. 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?
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(d) What is the general name of chromosomes such as B and E?
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Q. Match the following

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A	In human beings and a number of other animals, there are two types of chromosomes, ______, and allosomes.	1	44+XY
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Question 37
In tobacco plant, the male gametes have twenty-four chromosomes. What is the number of chromosomes in the female gamete? What is the number of chromosomes in the zygote??

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Standard IX Biology

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Question 20 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) two different chromosomes (c) sex chromosomes (d) any chromosome

Question 20
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) two different chromosomes
(c) sex chromosomes
(d) any chromosome