Some angelfish colors are determined by codominance. Possible phenotypes and genotypes of angelfish colors are shown below.

Which table shows the expected phenotypes of offspring resulting from a cross between a black angelfish and a black-lace angelfish?

Brenda claims that Jose is not the father of her child. Brenda has Type A blood and Jose has Type B blood. The baby has Type O blood.

What do you think?

If a child has Type A blood and his mother is heterozygous for Type B, what are the possible genotypes of the father?

Two men claim that they are the father of one little boy. A blood test was done to see if either one of the men could POSSIBLY be the father. The first man, Dwight, has Type A blood. The second man, Robert, has Type O blood. The little boy has Type AB blood and the mother, Angela, also has Type AB blood.

Who is the father of the little boy?

Cardi B is pregnant with her second child; however, she is unsure of who her baby daddy is this time. She has Type B blood (Get it?!?!?!). Her baby has Type O blood. Her list of potential baby daddies and their blood types are as follows: Drake is Type A, Travis Scott is Type B, Kendrick Lamar is Type AB, and J. Cole is Type O.

Which of the following could NOT be her baby daddy?

Which of the following genotypes represents an individual who would be considered a carrier for baldness, an x-linked recessive trait?

An unknown disease is a sex-linked recessive trait. Bella is worried that she might have the disease and goes to a genetic counselor to find out. The counselor tells Bella that her mom does not have the disease, her dad does, and that the disease is associated with the Y chromosome.

What is the probability that Bella has the disease?

In humans, the allele for normal vision (N) is dominant to the allele for colorblindness (n). Colorblindness is a sex-linked recessive trait that is located on the X chromosome. Liam and Allie are planning to have their first child. Liam is colorblind and concerned that he will pass this trait on to their child. Allie has normal vision. Their first child, a baby boy, is color-blind.

What is Allie's genotype?

In humans, the allele for normal vision (N) is dominant to the allele for colorblindness (n). Colorblindness is a sex-linked recessive trait that is located on the X chromosome. Liam and Allie are planning to have their first child. Liam is colorblind and concerned that he will pass this trait on to their child. Allie has normal vision. Their first child, a baby boy, is color-blind.

What is the probability that they will have a daughter who is color-blind?

Ellen and Patrick are planning to get married, but Ellen has a father who is a hemophiliac, an x-linked recessive trait, and she is concerned about having such a child herself. Ellen and Patrick are both normal and do not have the disease.

What is the probability that they will have a child that has hemophilia?

Muscular dystrophy is an x-linked recessive trait that causes the progressive weakening of the skeletal muscles. Unfortunately, mothers are responsible for passing this trait on to their sons. A mother who has muscular dystrophy marries a man who is normal.

What are the chances of this couple having a son who is affected?