Question

7. A woman with blonde curly hair married a man with black soft hair. All of their
children in first generation had black soft hair but in next generation children had
different combinations in the ratio of 9:3:3:1. State the law that governs this
Expression.​

Answer 1

Answer:

Law of independent assortment which states that the factors of different pairs of contrasting characters do not influence each other. They are independent of one another in their assortment.

Answer 2

Answer:

This expression is governed by the law of independent assortment (Mendel’s Second Law by Correns).

Explanation:

The law states that the alleles of two different traits separate independently from each other during gamete formation.

Father = Black and Soft hair (BBSS)

Mother = Blonde and Curly hair (bbss)

Parents (1)   =     BBSS × bbss

F1 generation =   BbSs (Black and Soft hair)

Parents (2)  =       BbSs × BbSs

F2 generation =   9 (Black and Soft hair)

                              3 (Black and curly hair)

                              3 (Blonde and Soft hair)

                              1 (Blonde and Curly hair)

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