Question

Attached earlobes are recessive to free earlobes. If two heterozygous individuals have a child, what is the probability of the child having attached earlobes?

Answer 1

probability of the child having attached earlobes since it is recessive i.e (yy)

=1/4

=0.25 × 100%

=25%

Step-by-step explanation:

If two heterozygous individuals have a child

i.e let the heterozygous individuals be = Xy

if both traits crosses together; their F₁ offspring will be; (XX, Xy, Xy, yy)

Xy × Xy

X y

X XX Xy

y Xy yy

probability of the child having attached earlobes since it is recessive i.e (yy)

=1/4

=0.25 × 100%

=25%