No, no one in Kate's family is homozygous for the trait since both her dad (Ee) and her mom (ee) are heterozygous for the inherited handcl trait.
In Kate's family, the inherited handcl trait is determined by a single gene with two alleles: a dominant allele (E) that results in the left thumb being on top and a recessive allele (e) associated with the right thumb being on top. Kate's observation that her left thumb is on top (dominant trait) suggests that she is heterozygous (Ee) for this trait.
When Kate examines her parents' handclasps, she finds that her dad has the dominant trait (left thumb on top), indicating that he carries at least one dominant allele (Ee). On the other hand, her mom exhibits the recessive trait (right thumb on top), suggesting that she is homozygous recessive (ee) for the inherited handcl trait.
Since Kate's dad is heterozygous (Ee) and her mom is homozygous recessive (ee), there is no individual in Kate's family who is homozygous dominant (EE) for the trait. Kate's family demonstrates a combination of heterozygous and homozygous recessive individuals in relation to the inherited handcl trait.
Complete ques:
When Kate clasps her hands together, she notices that her left thumb sits on top of her right thumb, which is a dominant trait (E). Kate then asks her parents to clasp their hands, and she discovers that her dad's left thumb is also on top of the right thumb. However, her mom's right thumb is on top, which is the recessive trait (e).
Is anyone in kates family homozygous for the trait?