An inversion heterozygote has the following inverted chromosome.  What is the result if crossing over occurs between genes F and G on an inverted and a normal chromosome in this individual?  

Achondroplasia (a form of dwarfism) is caused by a dominant mutant allele that is lethal in the homozygous state.  A woman with achondroplasia plans to have children with a man with achondroplasia.  What is the expected outcome for her surviving children?

A woman with type A blood has a child with type O blood. What are ALL the possible blood types of the father?

By conducting testcrosses, researchers have found that the sweet pea plant has seven linkage groups.  How many chromosomes would you expect to find in leaf cells of sweet pea plant?

Two different genes are linked on the same chromosome.  An aaBB individual is crossed to an AAbb individual to produce AaBb offspring.  The AaBb offspring are then crossed to aabb individuals to produce an F2 generation.  What are the genotypes of the F2 recombinant offspring?

Mendel’s Law of Independent Assortment states

Which of the following DNA double helices would be more difficult to separate into single-stranded molecules by treatment with heat, which breaks hydrogen bonds?

A diagram of a linear chromosome is shown here.  The end of each strand is labeled with A, B, C or D.  Which ends could not be replicated by DNA polymerases?

A Yy pea plant is crossed to another Yy plant.  What is the expected ratio of phenotypes for offspring from this cross?

The Igf2 gene that is inherited from the mother is silenced due to imprinting.  A mutation, which we will call Igf2—, is a loss-of-function mutation.  If an Igf2Igf2— mother is crossed to an Igf2Igf2— father, what is the predicted outcome?