The ability to roll your tongue is caused by a dominant gene (R). If you can't roll your
tongue, you are a non-roller and must be homozygous recessive (rr). If our trait of interest
is INABILITY to roll your tongue, in a Pedigree, A homozygous dominant female is
represented
by a(n):
A)Unfilled square
B)Unfilled circle
C)filled square
D)filled circle



Answer :

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