The parents in the figure shown are carriers of a genetic disorder.Based on the Punnett square,the allele that causes the disorder must be

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Since the Punnett square predicts a 25% chance of offspring inheriting the disorder, and since both parents are carriers, it is likely that the disorder is caused by a recessive allele on an autosomal chromosome. Sex-linked disorders are usually observed more frequently in males, since they only have one X chromosome, but this does not appear to be the case here. The Punnett square also does not suggest that the disorder is dominant or incompletely dominant, since the parents do not exhibit the disorder themselves.

The Parents in the Figure Shown Are Carriers of a Genetic