Freckles are a dominant trait in humans. Both of the girts have the genotype FF for freckles. If either one marries a man with no freckles, what are the chances that their children will have freckles? A) 0% 50% 75% 100%

A woman with a colorblind father marries a colorblind man. What would be all possible genotypes and phenotypes of their offspring?

Skin color in humans is determined by a polygenic inheritance system. The husband is white while the wife is of Nigerian heritage. However, their two children are all light-skinned. How were the married couples able to have light-skinned babies. Are the odds to have a light-skinned baby one in a million? What are the possible genotypes of the husband and the wife and their children.

In humans, the gene for right-handedness is dominant to the gene for left-handedness. A man and a woman both heterozygous for this trait marry. What percent of their children can they expect to be right-handed? What percent left-handed? What are the genotypic and phenotypic ratios?

Doing genetic analysis it is determined that two parents are heterozygous for two separate unlinked recessive traits (i.e., both parents are heterozygous for both loci). Given this genetic information, what is the probability of their having a child which is homozygous recessive for both traits?

Chloe has a family history of colorblindness. Corry, her partner, is affected by colorblindness. Colorblindness is an X-linked recessive condition that has the alleles XB which means -unaffected and dominant- and Xb which means -affected and recessive-. Chloe’s mom was affected, but her dad was not. Her partner Corry is also affected. (a)What is the probability that if Chloe and Corry were to have a daughter that she would be affected? (b)Also, what are the chances that if they had a son that he would be affected? Answer (a) and (b) by creating a pedigree and punnet squares

Assume that attached earlobes are an autosomal recessive trait with 73% penetrance. If one parent is heterozygous (Aa) and the other homozygous recessive (aa) for the attached earlobe gene, what is the probability that their second child will have attached earlobes? O 73% O 36.5% O 50% O 63.5% O 27% O 13.5% O 18.75%

A man with blood type B marries a woman with blood type A. They have four children with blood types A,A,B, and AB. What are the genotypes of the parents?

A colorblind man marries a female who is a carrier for colorblindness. What is the probability that they will have a child who is colorblind?

A WOMAN IS HETEROZYGOUS FOR A TRAIT CAUSED BY A DOMINANT ALLELE THAT SHOWS 75% PENETRANCE. HER PARTNER IS UNAFFECTED. WHAT IS THE PROBABILITY THAT, IF SHE HAS A CHILD, IT WILL BE AFFECTED? (HINT: WHAT'S THE CHANCE SHE WILL PASS THE ALLELE ON TO HER CHILD AND THAT THE CHILD WILL SHOW THE TRAIT?)