1 The ability to roll the tongue is caused by a dominant all

1. The ability to roll the tongue is caused by a dominant allele. A woman can roll her tongue but one of her parents can not. what is the woman\'s genotype?

A) Homozygous dominant B) Heterozygous C) Homozygous recessive D) Either homozygous recessive or homozygous dominant

2. Consider the following characteristics of a given pedigree. What mode of inheritance is most likely?

A) X-linked dominant B) Y-linked dominant C) Autosomal recessive D)Autosomal Dominant E) X-linked recessive

Solution

Answer:

1). B) Heterozygous

R= Roll

r= non roll

Rr x rr -----------Parents

2). D)Autosomal Dominant