If a man who is heterozygous for hitchhiker's thumb marries a woman who is also heterozygous for hitchhiker's thumb, predict the potential genotypes and phenotypes for the offspring for that trait

Hitchhicker's thumb is a condition in which a person is able to bend his thumb backwards. This trait can be seen in many people but the condition is recessive, which means a person needs two alleles for  hitchhiker's thumb to have this particular characteristics. The gene for straight thumb is commonly indicated by T while that for hitch hicker's thumb is indicated by t.

Let's see what will happen if a person heterozygous for hitchhiker's thumb marries a woman who is also heterozygous for hitchhiker's thumb.

P1:                       Tt                X             Tt

Gametes:            t    T            :      t        T

Offsping :          TT    :     Tt     :       tT      : tt

TT    :        25 % :     Straight thumb

Tt + tT :    50% :      Straight thumb

tt :              25% :      Hitch hicker's thumb

Therefore, there are 25 % chances that their offspring will have Hitch hicker's thumb and 75 % chances that they will have straight thumb.

Hope it help!

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).