P1: wispy whisker, pink eye, hairy female in x thick whisker, brown eye, hairles

Question

P1: wispy whisker, pink eye, hairy female in x thick whisker, brown eye, hairless male #A F1: all wispy whisker, brown eye, hairy rodents F2: 910 wispy whisker, brown eye, hairy rodents 290 thick whisker, brown eye, hairless rodents 110 thick whisker, pink eye, hairless rodents 280 wispy whisker, pink eye, hairy rodents 3 wispy whisker, brown eye, hairless rodents 4 thick whisker, brown eye, hairy rodents 1 wispy whisker, pink eye, hairless rodents 2 thick whisker, pink eye, hairy rodents a) What are the dominance patterns of the traits? b) What are the genotypes of each parental group? Which, if any, of the genes are linked? What are the map distances between the linked genes Male C: elegans expressing the recessive mutations l (long), r (rolling), t (touch insensitive), and u (uncoordinated) are crossed to phenotypically wild-type females. The phenotypes of the 3288 F2 progeny are shown below. 653 uncoordinated, long, rolling, touch insensitive 670 long, rolling, touch insensitive 675 wild type 655 uncoordinated 73 uncoordinated, long 71 long 73 uncoordinated, rolling, touch insensitive 74 rolling, touch insensitive 88 uncoordinated, long, rolling 83 long, rolling 85 uncoordinated, touch insensitive 84 touch insensitive 1 uncoordinated, long, touch insensitive 1 long, touch insensitive 1 uncoordinated, rolling 1 rolling a) Diagram the genotype of the female parent. b) Map the loci (i.e., determine the position and map distances among the genes). c) Is there evidence of interference? Justify your answer with numbers.

Explanation / Answer

The terms dominant and recessive describe the inheritance patterns of certain traits. That is, they describe how likely it is for a certain phenotype to pass from parent offspring.

Sexually reproducing species, including people and other animals, have two copies of each gene. The two copies, called alleles, can be slightly different from each other. The differences can cause variations in the protein that’s produced, or they can change protein expression: when, where, and how much protein is made. Proteins affect traits, so variations in protein activity or expression can produce different phenotypes.

A dominant allele produces a dominant phenotype in individuals who have one copy of the allele, which can come from just one parent. For a recessive allele to produce a recessive phenotype, the individual must have two copies, one from each parent. An individual with one dominant and one recessive allele for a gene will have the dominant phenotype. They are generally considered “carriers” of the recessive allele: the recessive allele is there, but the recessive phenotype is not.

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.