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Left-handedness (r) is recessive in humans and right-handedness is dominant (R).
Tracy, a left-handed woman, and whose mother and brother are also left-left handed,
marries Sa who is right-handed. Sam's mother is left-handed and his father and sister
are right-handed. What is the expected genotypic ratio of the children Sam and Tracy
might have?
ORr:2rr:ORR
1Rr:2rr:1RR
2Rr:2rr:ORR

Respuesta :

adefioyelaoye

The expected genotypic ratio of their children is 2Rr:1rr:1RR.

What is Genotype?

This can be defined as the genetic composition of an organism. Since Sam and Tracy possess heterozygous traits, their genotypes will be Rr and Rr.

When this is crossed , we will get :

Rr  × Rr

RR Rr Rr rr

This means the genotypic ratio will be 2Rr:1rr:1RR.

Read more about Genotype here https://brainly.com/question/22117

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