Question

Q1.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. Write the
genetic makeup (genotype) of the tall parent.

Answer 1

The tall plants could be

homozygous tall homozygous violet  

homozygous tall heterozygous violet

heterozygous tall homozygous violet

heterozygous tall heterozygous violet

Answer 2

The condition clarified is a dihybrid cross which includes two characters in a solitary plant.  

In the given cross, the parent pea plants are of two kinds:  

Tall plants with violet blooms  

Short plants with white blooms  

Along these lines, the genotype of the guardians could be:  

Tall plants with violet blooms: TTWW or TtWw  

Short plants with white blooms: ttww  

Since, all the descendants bore violet blossoms, it suggests that the tall plant with violet blooms has genotype 'WW' for violet blossom shading.  

Since, the descendants got is both tall and short, the parent plant was not an unadulterated tall plant and bears qualities that decide short stature of the plant. Along these lines, the genotype of the plant concerning stature would be 'Tt'.  

In this way, if a cross is done between tall parent with violet blooms (TtWW) and short parent with white blossoms (ttww), the offspring acquired is TtWw (8):ttWw (4):ttWw(4).  

All the descendants bear violet blooms however 50% of them are tall and half are short.