woman who is a carrier of sickle-cell trait (making her a heterozygote) has children with a man who is totally healthy and does not carry the gene for sickle-cell trait at all. Which one of the following is true about their potential children? (Draw a Punnett square on scratch paper if it helps you.) A) None of their children will have sickle-cell disease. B) All of their children will have sickle-cell disease. C) All of the couple's

Hereditary hemochromatosis is an autosomal recessive genetic disorder that causes the body to absorb too much iron from the diet. This excess iron is stored in the body's tissues and organs, particularly the skin, heart, liver, pancreas, and joints. Because humans cannot increase the excretion of iron, excess iron can overload and eventually damage tissues and organs. A. Symptoms of hereditary hemochromatosis include fatigue, joint pain, arthritis, diabetes, heart disease, skin discoloration, delayed puberty in males, and premature menopause in women. All of these symptoms result a single mutation in a specific gene. Name and define this genetic phenomenon and explain how it relates to this specific genetic situation described above.

Below is a pedigree chart for a family that has a history of Alkaptonuria.   Individuals infected with this condition can have darkened skin, brown urine, and can suffer from joint damage and other complications.  Given this pedigree answer the following questions.   Given the data in the pedigree chart is this genetic condition autosomal dominant or autosomal recessive? What are the genotypes for #1, #2, and #3?  If either of the 4th generation "aa" females were to mate with a homozygous dominant male would any of their offspring illustrate the phenotype?  Why or why not?

In an X linked condition "b" , a person with genotype  XbX , can be described as what ? a) female who has the disease b) female who is a carrier c) male with disease d) male with no disease ( Not sure if that was more detailed ? )

A heterozygous woman with Type-A blood, and a man with Type-O blood, have a child. What are the odds that the child will have type O-blood? A) 25% B) 75% C)100% D) 50%

If a girl has blood type B and her mother has blood type A, what genotype(s) and corresponding phenotype(s) could the other parent have?

A patient has two parents with Huntington's disease. They may not have inherited this autosomal dominant disorder due to: 1) increased DNA repeats (CAG) during spermatogenesis O2) incomplete penetrance 3) inheriting one recessive allele

hemophilia is a sex linked recessive disease.  Dick does not have hemophilia.  His wife Debi is a heterozygote. They are having fraternal twins, one of each sex, who they have named Dick Jr. and Debi Jr.  What are the chances of Dick Jr. having hemophilia?  Debi Jr.?

A couple, who are both normal, have a daughter who is albino and a son who is normal. a) what is the probability that their normal son is a carrier of the albinism gene? Show your work. b) the couple wants to have 3 more children; what is the probability that they will have 3 normal girls? Show your work.

Cystic fibrosis (CF) is an autosomal recessive trait. A three-generation pedigree is shown below for a family that carries the mutant allele for cystic fibrosis. Note that carriers are not colored in to allow you to figure out their genotypes.      Normal allele =  F      CF mutant allele =  f        What is the genotype of individual #13? A) ff B) FF C) Ff  D) it is impossible to tell