First slide

Inheritance of One Gene

Question

In Antirrhinum majus when a pink flower was crossed with a red flower. Identify the correct statement w.r.t to this line:

Easy

A

$1 / 4^{th}$ of offspring has red flower, $1 / 4^{th}$ of offspring has white flower and 2/4th of offspring has pink flower
B

Pink colour is due to co-dominance.
C

This experiment follows the Principle of Dominance.
D

Law of segregation is followed in this experiment

Solution

Law of segregation states that though the parents contain two alleles during gamete formation, the factors or alleles of a pair segregate from each other such that a gamete receives only one of the two factors. This is applicable for incomplete dominance as well. Pink flower is due to incomplete dominance. This experiment is a deviation from the law of dominance.
When plant with pink flowers is crossed with plant with red flowers then the $F_{2}$ generation will have 50% pink flower and 50% red flower.

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