Indicate the type of inheritance involved in each of the following situations: (1)children who exhibit the trait have at least one parent who also exhibits it; (2)children exhibit the trait even though neither parent exhibits it; and (3)the trait is expressed equally in daughters and sons.
A)(1)simple inheritance (recessive); (2)simple inheritance (dominant); (3)autosomal inheritance
B)(1)simple inheritance (recessive); (2)simple inheritance (incomplete dominance); (3)autosomal inheritance
C)(1)simple inheritance (dominant); (2)simple inheritance (recessive); (3)autosomal inheritance
D)(1)sex-linked inheritance (dominant); (2)sex-linked inheritance (recessive); (3)autosomal inheritance
E)(1)polygenic inheritance; (2)simple inheritance (recessive); (3)sex-linked inheritance

Question

Quizplus · Accepted Answer

For (1), if children exhibit a trait that at least one parent has, it suggests dominant inheritance because only one copy of the dominant allele is needed for the trait to be expressed. For (2), if children exhibit a trait that neither parent shows, it suggests recessive inheritance, as both parents can be carriers (heterozygous) without showing the trait themselves, but can still pass the recessive alleles to their offspring. For (3), if a trait is expressed equally in daughters and sons, it suggests autosomal inheritance, as the trait is not linked to sex chromosomes and thus affects both genders equally.

Indicate the Type of Inheritance Involved in Each of the Following