A recipient’s antibody screen is negative; however, the recipient is incompatible with the selected donor unit. Select a possible explanation for these results.

If a red blood cell appears like a sickled cell or is an elongated cell, you would describe this appearance with the term

Two blue chickens were mated. The progeny of this mating had the following phenotype ratio: 1 white chicken : 2 blue chickens : 1 black chicken. What type of inheritance pattern does this 1:2:1 phenotype ratio suggest?

In humans, occasionally a baby is found that has the XX chromosomal karyotype but is phenotypically male. Which of the following statements might be a CORRECT explanation for at least some of these unusual cases?

A woman has type A blood. A man has type B blood. Can they have a child with type O blood?

Early in development the reproductive tract can become either male or female, embryos with SRY develop testes and male reproductive tract and genitalia, if embryo has WNT4 and no SRY its reproductive system becomes female.

Consider the karyotype below:   This karyotype shows chromosomes from a . The arrow is pointing to . The karyotype shows that this individual  

Even though Isaiah Austin has Marfan syndrome the NBA still allows him to play basketball.

Mendel crossed pure-breeding tall plants with pure-breeding short plants. He found that all of the F1 plants were tall. When these F1 plants were allowed to fertilize themselves, the F2 plants occurred in a ratio of 2.84 tall to 1 short. Which of the following is NOT a valid conclusion from these results?r

The first gene therapy for blindness was used to treat ,which is caused by a mutation in the gene. This gene normally encodes for a protein necessary for . This is an example of gene therapy, because it is injected directly into the eye. The eye is a good target for gene therapy because they are , and experiments can be performed within the same patient. This is also an example gene therapy. The name of this FDA-approved gene therapy is , and costs per eye.