Trait R is a Mendelian trait in humans for tongue rolling. The allele for the ability to roll the tongue (R) is dominant over the allele for the inability to roll the tongue (r). If both a mother and...

Extracted text: Trait R is a Mendelian trait in humans for tongue rolling. The allele for the ability to roll the tongue (R) is dominant over the allele for the inability to roll the tongue (r). If both a mother and father are heterozygotes with respect to this trait, what is the likelihood that their offspring will also be a heterozygote for that trait? O 100% O 25% O 75% O 0% O 50%