In 1995, doctors reported a Chinese family in whichretinitis pigmentosa (progressive degeneration of theretina leading to blindness) affected only males. Allsix sons of affected males were affected, but all of thefive daughters of affected males (and all of thechildren of these daughters) were unaffected.a. What is the likelihood that this form of retinitispigmentosa is due to an autosomal mutationshowing complete dominance?b. What other possibilities could explain the inheritance of retinitis pigmentosa in this family? Whichof these possibilities do you think is most likely?

Goatee A Bearding in goats is inherited as an autosomal trait determined by two alleles, B1 and B2. Interestingly, the bearded trait is recessive in females, while it is dominant in males. In both sexes, homozygotes for the B1 allele are beardless. Which of the following is true? (more than one correct answer possible) Males with the genotype B1B1 are beardless Females with the genotype B1B2 are beardrd Males with the genotype B1B2 are bearded Females with the genotype B1B1 are bearded Females with the genotype B2B2 are beardless. Males with the genotype B2B2 are bearded

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.

Question 15: Consider the consequence if one of the mutations you tested for complementation was a dominant mutation. You should see that complementation tests could not be used to provide information about dominant mutations. a) If a mutation were dominant how would your interpretation of the phenotype of the diploid be altered? No change would occur v b) How would you test whether any of these trp mutations were dominant? There is no way to test fc V

Could someone please help me with this grade 11 bio dihybrid cross problem on how to solve this question, using a strategy in detail! Assume that curly hair (C) is dominant to straight hair. Albinism (P ) is recessive to normal skin pigmentation. A woman who is heterozygous for curly hair and albinism has a child. The father is homozygous dominant for curly hair and has albinism. (a) Determine the possible phenotypes for their child. (double-crossing, Punnet square) (how to display the traits) (b) Calculate the four different probabilities of a child beingboth a male and of each phenotype. (steps in solving this) (c) What is the probability that the child will expressalbinism and have curly hair like his father? (steps in solving this)

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

Suppose you are testing the null hypothesis that the mode of inheritance for a particular disease in elegant cranes is sex-linked recessive. You employ the following crosses, where R is the wild-type allele, r is the disease allele, and Y is Y-chromosome allele (only in males): Parental cross (Affected male with unaffected (carrier) female): rY x Rr. F₁ cross (Unaffected male with affected female): RY x rr. Suppose you perform these crosses at two different research locations. You obtain the following counts in the F2 generation: Location 01 Male, Disease: 200 Male, Wild-type: 225 Female, Disease: 211 Female, Wild-type: 205, Location 02 Male, Disease: 320 Male, Wild-type: 325 Female, Disease: 354 Female, Wild-type: 310 Do you reject or not reject the null hypothesis that the mode of inheritance is sex-linked recessive at each location? The significance level is 0.01. (Hint: when applying the ChiSq goodness of fit test, if the expected value for a row is 0, remove that row and reduce…

The inheritance pattern of a rare form of Xeroderma pigmentosum is exhibited in the pedigree shown below. The pattern of inheritance of the Xeroderma pigmentosum phenotype suggests what type of inheritance. please explain your reasoning.

Duchenne muscular dystrophy is an inheritable disorder that results in muscle weakness, leading to walking and breathing difficulties and heart disease. Which of the following is a valid conclusion about the Duchenne muscular dystrophy pedigree shown above? a. Without further evidence, the genotypes of individuals II-2 and III-2 cannot be determined. b. Only individuals I-1 and II-3 are confirmed carriers of the Duchenne muscular dystrophy allele.