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Right handedness is dominant over left handedness. Most probable genotype of parents with right handedness with a lefthanded child is
Option: 1
RR x rr
Option: 2
Rr x RR
Option: 3
RR x Rr
Option: 4
Rr x Rr
Answers (1)
If both the parents are right handed, they must have either RR or Rr genotype. But if they have one child with left handedness, means the child has received the left handedness allele (r) from both the parents. Hence, the parents are heterozygous for right handedness.
So, the correct option is Rr x Rr.
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