What is the percent chance that one of the offspring will have the genotype GG?

To determine the percent chance of offspring having the genotype GG, it is essential to consider the genetic makeup of the parents. Typically, if both parents are heterozygous for a trait (represented by the alleles G and g), you can use a Punnett square to visualize the potential outcomes for their offspring.

When two heterozygous parents (Gg x Gg) are involved, the possible gametes from each parent are G and g. The combinations in the Punnett square lead to the following genotype possibilities for the offspring:

1. GG (homozygous dominant)

2. Gg (heterozygous)

3. gG (heterozygous)

4. gg (homozygous recessive)

Counting the results from the Punnett square, there are four outcomes, with only one resulting in the GG genotype. Thus, the probability of having an offspring with the GG genotype is 1 out of 4, which is expressed as a percentage by multiplying by 100. This calculation gives you a 25% chance that one of the offspring will have the GG genotype.