4. The principles that govern the inheritance of two independently assorting genes hold for more than...
Consider the cross (assume a capital allele is dominant to a small case allele): Aa Bb Cc Dd Ee X aa Bb cc Dd ee a) What proportion of the progeny will resemble phenotypically: (1) the female parent? (2) the male parent? (3) either parent? (4) neither parent? b) What proportion of the progeny will resemble genotypically: (1) the female parent? (2) the male parent? (3) either parent? (4) neither parent?
Peas heterozygous for three independently assorting genes were intercrossed. (example cross: Aa Bb Ccx Aa Bb Cc) What proportion of the offspring will be homozygous for all three recessive alleles? What proportion of the offspring will be homozygous for one gene and heterozygous for the other two?
Two independently assorting genes help determine fruit color in squash. At the first locus, the W allele codes for a dominant white phenotype, whereas the w allele allows colored squash. At the second locus, the allele Y codes for a dominant yellow phenotype, and the allele y codes for a recessive green phenotype. The interaction between these two genes is an example of dominant epistasis, with the W locus acting as the epistatic locus and the Y locus acting as...
Consider the following cross examining four unlinked genes. Identify what proportion of progeny will be phenotypically identical to parent 2? A/a; B/d; e/e times A/a; b/b; E/e
1. At least 3 independently assorting loci are known to govern coat color in mice. The genotype C- will allow pigment to be produced by 2 other genes. The cc genotype does not allow pigment production resulting in albino mice. The striped “agouti” hair pattern depends on the genotype A- and the aa genotype is nonagouti. Finally, the color of the pigment may be black (B-) or brown (bb). Five different coat colors may be produced by the action of...
2. Consider the cross Aa Bb Cc Dd X aa Bb cc dd. All of the genes are on mes. What proportion of progeny will phenotypically resemble the second parent (i.e. the parent listed second in the cross)? Show each individual cross AS OUTLINED IN CLASS. Punnett squares are NOT allowed. Also, show the final calculation to get your answer. In other words, show all of your work. (5 marks) SEDOT a slobo Question 10 (1 point) For the peptide:...
4. In summer squash, fruit color and shape are controlled by two independently assorting genes as follows: Trait Gene Alleles Phenotypes Fruit color W W w White fruit yellow fruit Fruit shape D D d Disk-shaped fruit sphere-shaped fruit A homozygous White Disk plant has been crossed with a homozygous Yellow Sphere plant (this is the P1 generation). List the expected genotype and phenotype of the F1 plants? P1 WWDD x wwdd F1 WwDd Genotype: WwDd Phenotype: White, Disk If...
7) In Labrador retrievers, 2 independently assorting genes interact to generate coat color (B, b and E, e). The genotype B_E_ results in black coat; bbE_ results in chocolate coats; B_ee results in yellow coat; and bbee results in yellow coat. If you were a breeder, you might be especially interested in producing black and brown labs, since they might fetch the most money when sold. What proportion of these two phenotypes would you expect from the following crosses? a)...
1) Coat color in mice is determined by several independently assorting autosomal genes. Gene A is involved in the distribution of pigment along the hair. A dominant allele (A) produces a hair color called "agouti"--the hair has dark pigment at the base and tip of each hair shaft and yellow pigment in the central portion of the shaft. Homozygous recessive mice (aa) are missing the yellow stripe and thus have solid dark-colored hair. Gene B is involved in the color...
In rats, several independently assorting autosomal genes affect coat color. Gene A controls the distribution of yellow pigment in hair, and gene B causes black pigmentation. The two genes interact as follows: A–B– (gray), A–bb (yellow), aaB– (black), and aabb (cream). These genotypes are only expressed in the presence of the dominant allele of a third gene, C; rats with genotype cc are albino. a. Deduce the genotype of each albino mice, to the extent that is possible, in the...