1) (8 point question) A black color coat ( B_) in mice is dominant to a brown color coat ( bb ). A scientist crosses two black mice that have previously produced a litter with some brown babies. If the next litter produces five mice:
A) (2 point) What is the probability that the first bom will be brown?
B) (2 point) What is the probability that at least one of them will be brown?
These mice have genes that control other traits (A, D, E and F) and are all segregating for two alleles and show independent assortment. Given those observations, and the fact that the parent mice have the following genotypes:
Male: Aa, Bb, Dd, ee, Ff Female: aa. Bb, Dd, Ee, FF
C) (2 poi.) What is the probability of the first pup having the same phenotype as the mother? Show your calculations.
D) (2 points) What is the probability of the first pup having the same genotype as the father? Show your calculations.
2) (7 point question) The diagram shows the nucleus of a cell just before the start of meiosis 2.
A) (1 point) How many pairs of homologous chromosomes will been be in the zygote cells of this organism?
B) (2 points) If present in this diagram, draw two arrows that indicate any two sister chromatids that are a pair (label each arrow se)
C) (2 poi.) If present in this diagram, draw two arrows that indicate any two homologous chromosomes (label each arrow he)
D) (2 points) The genn cells of the organism that led to this cell are heterozygous for the A gene (genotype Aa). The letter A represents the location of a dominant allele. Indicate the location of ALL the other alleles for this gene in this cell. Assume there was no crossing over during meiosis 1.
A M:■11•
