First slide

Inheritance of Two Genes

Question

In a test cross involving F1 dihybrid flies, more parental type offspring were produced than the recombinant-type offspring. This indicates

Moderate

A

the two genes are linked and present on the same chromosome
B

both of the characters are controlled by more than one gene
C

the two genes are located on two different chromosomes
D

chromosomes failed to separate during meiosis.

Solution

In a test cross involving F1 dihybrid flies, more parental type offspring were produced than the recombinant-type offspring. This indicates that the two genes are linked and present on the same chromosome. Lesser the distance between the genes, lesser are the chances of crossing over. Lesser the crossing over, lesser the production of recombinants and more is the number of parental characters.

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