In Biology / High School | 2025-07-05

Marfan syndrome is a genetic trait caused by a dominant allele. A teenager whose mother has the syndrome (but whose maternal grandfather was not affected), and whose father was unaffected, is concerned that she may have the trait. Write out a Punnett square showing this cross using the letter A/a for the gene that determines Marfan syndrome.

Asked by zulonee1