Bateson used the terms coupling and repulsion for linkage and crossing over. Name the correct parental or coupling type along with its cross over or repulsion:

Which of the following is suitable for experiments on linkage?

The colour based contrasting traits in seven contrasting pairs, studied by Mendel in pea plant were

F2 generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1 : 2 : 1. It represents a case of :

What is the ratio of one pair of contrasting character in F2 of a dihybrid ratio.

Theoretically, the modified allele could be responsible for the production of

I. the normal / less efficient enzyme

II. a non-functional enzyme

III. no enzyme at all

What map unit (Centimorgan) is adopted in the construction of genetic maps?

In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F1 generation pink flowers were obtained. When pink flowers were selfed, the F2 generation showed white, red and pink flowers. Choose the incorrect statement from the following :

The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by :