A gene that controls for the skin colour of a variety of apples has two alleles A and a. The allele A is dominant and it is associated with the colour red, whereas the allele a is recessive and it is associated with the colour yellow. If two heterozygous apples are crossed with each other, what is the probability of one of the offspring being red?

Question

Quizplus · Accepted Answer

The cross of two heterozygous apples (Aa x Aa) follows Mendelian genetics, resulting in a 3:1 phenotypic ratio for dominant (red) to recessive (yellow) traits. Therefore, the probability of an offspring being red is 75%.

A Gene That Controls for the Skin Colour of a Variety