JAMB - Biology (2010 - No. 41)
If both parents are heterozygous for a trait, the probability that an offspring will be recessive for that trait is?
\(\frac{1}{2}\)
\(\frac{3}{4}\)
\(\frac{1}{4}\)
1
Spiegazione
The expected genotype ratio when two heterozygotes are crossed is 1 (homozygous dominant) : 2 (heterozygous) : 1 (homozygous recessive).