| Direction: Each of these questions contains two statements |
| Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below. |
| Assertion [A] In dihybrid cross, the two pairs of factors are located in two pairs of homologous chromosomes. |
| Reason [R] Each chromosome bears two pairs of factors. |
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true, but R is not the correct explanation of A
C) A is true, but R is false
D) A is false, but R is true
Correct Answer: C
Solution :
[c] A is true, but R is false because In a dihybrid cross, two different characters are crossed together. For example, a cross between round yellow seeds with green wrinkled seeds. Here, two characters both texture and colour are involved. Such a corss is called a dihybrid cross. These two characters are located on different homologous chromosomes. But a single chromosome does not bear two pairs of factors, they are located on two different chromosomes.
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