Q. 13.9( 64 Votes )

A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggests that the genetic make-up of the tall parent can be depicted as:

Give reason for your choice.
A. TTWW

B. TTww

C. TtWW

E. Tt Ww

Class 10th NCERT - Science 9. Heredity and Evolution

Answer :

According to the question, tall pea plant bearing violet flower plants were bred with short pea plant bearing white flower plants. The progeny had short pea plant bearing violet flower plants. Genetic make-up of tall parent is decided as follows-

The parent should have dominant genes for violet flower color to be inherited by the progeny, so WW must be gene pair.

For height, the parent should have one recessive gene and one dominant for height in it, so Tt must be the genes in parent plant. Thus TtWW is the genetic make-up of the parent in order so that the progeny should have short violet flowers.

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