Due to dosage compensation by X inactivation, females can exhibit a mosaic pattern of sweat glands on only some portions of their body if they carry a particular loss of function allele. Could any of the following genotypes result in males with such a mosaic pattern of sweat glands? Explain. A. X^AY B. X^AX^AY C. X^AX^aY D. Not possible

The following four plants have been identified as having the listed gametophytic self-incompatibility genotypes: Plant 1: S2Ss Plant 2: S5S7 Plant 3: S1S2 Plant 4: S1S7. Predict the progeny from the following crosses. a. Plant 1 x Plant 2 U b. Plant 1 x Plant 3 c. Plant 1 x Plant 4 d. Plant 2 x Plant 4 e. Plant 4 x Plant 3 % 5 A 6 MacBook Pro 13 13 & 7 8 9

4. In this pedigree of another family with hemophilia A. If the woman Il-2 has a son, what is the chance that he is affected? II B. If the woman Il-2 has a daughter, what is the chance 1 2 3 4 III that she is affected? -1 C. If the woman Il-2 has 2 sons, what is the chance that neither will be affected? D. What are the chances that the child of II-4 and Il-5 will be affected?

3) In the snail Capaea nemoralis, an autosomal allele causing a banded shell (B®) is recessive to the allele for an unbanded shell (B°). Genes at a different locus determine the background color of the shell; here yellow (C') is recessive to brown (CBw). A banded, yellow snail is crossed with a homozygous brown, unbanded snail. The F1 are then crossed with banded, yellow snails (a test cross). a. What will the results of the testcross be in the loci that control banding and color ARE linked with NO crossing over.

In mice, coat color is due to the inheritance of three genes located on three different chromosomes.  The A gene which determine if a yellow band is present on the hair     ( A_= yellow band, aa= no yellow band ) and the B gene which determines if the hair is brown ( bb ) or Black ( B_).  The A and B genes interact to produce the following coat colors: Agouti:     A_B_ Cinnamon:  A_bb black:       aaB_ brown      aabb The third gene is the C gene, which determines if the mice has any hair pigment at all.  If the mouse has at least one C allele then the coat color will be determined by the A and B genes as described above.  However, if the mouse is cc in genotype it will be albino, regardless of the mouse’s A and B genotype. 1.If a AabbCc mouse mates with a aaBbcc mouse, what is the probability that the mouse will be born brown? (a) ½    (b) ¼  (c) 1/8   (d) 1/16   (e) none of the above

Blood types in humans are Codominant. a. What are the possible genotypes of someone with type O blood? b. What are the possible genotypes of someone with type B blood? c. What is the phenotype of someone’s whose genotype is AO? d. A man with AB blood is married to a woman with AB blood. What blood types will their children be and in what proportion?

In fruit flies, red eyes (E) are dominant to white eyes (e). Cross two heterzygotes.  a. What are the possible genotypes for red eyes ? b. What are the possible genotype(s) for white eyes ?