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Show your work for all problems. 1) A diploid species of hamsters has a total of...
1. In Drosophilia, females are XX, while males are XY. Yellow bodies are determined by an X-linked recessive mutation Xb, while the dominant wild-type allele XB produces brown bodies. A heterozygous female is crossed with a brown bodied male to produce the F1 generation. a) Among the F1 generation, what genotypes and phenotypes would be expected among the progeny, and in what proportion? b) from the F1 generation, males and females are mated at random. What genotypes and phenotypes would...
8. [12 pts total] Huntington disease is a rare degenerative autosomal disorder that determined by a dominant allele. The disorder is typically manifested after the age of 45. A young man has learned that his father has developed the disease; his mother does not carry the dominant allele for the condition [4 pts] A. What is the probability that the young man will later develop the disease? (4 pts] B. If the young man has a child with a woman...
2. In Labrador dogs, there are 2 loci that determine coat color. The first locus, B is dominant to b. At least one B allele will produce black coat color, while the bb genotype produces a chocolate coat color. This first locus also determines nose color in Labradors: B_ black noses, and bb brown noses. The second locus has a genotype, ee, that is epistatic in nature. Any Labrador with an ee genotype will be yellow. A genotype containing at...
P1: wispy whisker, pink eye, hairy female #1 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...
1)When Gregor Mendel conducted his genetic experiments with pea plants, he observed that a trait’s inheritance pattern was the same regardless of whether the trait was inherited from the maternal or paternal parent. Mendel made these observations by carrying out reciprocal crosses: For example, he first crossed a female plant homozygous for yellow seeds with a male plant homozygous for green seeds and then crossed a female plant homozygous for green seeds with a male plant homozygous for yellow seeds.Unlike...
vields black aegene is r-quired to produce orange cas fur the recesstvo little o orange fur altemating with patterns of is allele of O allele of the X-linked orange wah gene yields black fur. Tortoisesheil cats have coats with patches of hich of the following terns of black fur 3. ) ange female oroses could produce a XX fama ortoise B. Black female x orange C. Orange female x o ange D. Two of the above couloace a female E....
A geneticist discovered a maternal effect gene in a new species of fly which controls the formation of head and thorax segmental development. The progeny of female flies bearing at least one copy of the dominant allele m+ were found to develop normally. However, the allele m had a lethal penetrance of 28%. In a mating experiment performed by the geneticist a female fly with the genotype mm was mated with a male fly with the genotype m+m. Assume that...
Name Sex-linked traits are genetic char segments of DNA found on chromosomes that Sex-Linked Traits Senetic characteristics determined by genes located on sex chromosomes. Genies are and on chromosomes that carry information for protein production and that are sponsible for the inheritance of specific traits Genes exist in alternative forms called alleics. or a trail is inherited from each parent Like traits originating from genes on autosomes (non-se chromosomes), sex-linked to omosomes), sex-linked traits are passed from parents to offspring...
A mutation in the Drosophila bristle gene (fb) (which is X-chromosome linked) causes a recessive forked bristle phenotype (rather than the normal type of bristle). Another mutation in Drosophila autosomal body color gene (BR) causes a recessive brown color body (rather than the normal black body). A geneticist carried out the following cross: X+ / Y ; BR/br x X+/ Xfb ; BR/br If total of 240 F1 progeny were obtained, the “expected” numbers are: normal bristle male progeny -...
T.H. Morgan also performed the following set of breeding experiments involving another mutant strain with yellow body colors, Xy, which is linked to X chromosome. The allele for the normal brown body color is indicated with Xy+. The interpretation of the breeding outcomes ended up discovering genetic linkage. P: female with normal eye and body color (w+,y+/w+,y+) x male with white eye and yellow body (w,y/Y) 14. In this cross, F1 flies had the following phenotypes and genotypes. Which...