You are investigating a newly emerging bacteriophage infecting your bacteria. There is a population of bacteria that are resistant to the disease. The allele frequency of the resistant allele is q=0.43. The mutation rate (Aàa) of the locus is 3.2 x 10-2. Assuming no back mutations, how do you expect the allele frequency of the recessive allele to change in the next generation?   a. It will decrease a little   b. It will not change   c. It will decrease a lot   d. It will increase a little   e. It will increase a lot

Gene B is a deleterious autosomal dominant. The frequency of affected individuals is 4.0 × 10−6. The reproductive capacity of these individuals is about 30 percent that of normal individuals. Estimate μ, the rate at which b mutates to its deleterious allele B.

Give typed explanation

In fruit flies, you are studying three genes, whose recessive alleles can generate interesting traits. The abnormal traits are “short” – gene s, “ruby-eyed” – gene r, and “ebony body” – gene e. You have been provided an F1 population of flies that are heterozygous at all three of these gene and you testcross these flies by “ssrree” flies. The attached image lists any recessive traits displayed by the flies, unlisted traits are wild type. a) the genotype of the parental flies used to make the F1 population,b) determine if any of these three genes are located on the same chromosome or are unlinked,c) if possible, correct your data for double crossover events evidenced in the ratios,

Sickle cell anemia is caused by a recessive allele at a single gene. As we discussed in class, being a homozygote for the sickle cell allele is almost always lethal, but heterozygotes tend to be resistant against malaria although they have a mild form of anemia. Because of this heterozygote advantage, the allele for sickle cell anemia has a frequency of more than 10% in some human populations.     How would present allele frequencies of the sickle cell allele change, if there was no heterozygote advantage or disadvantage (that is, that heterozygotes would be identical to ‘normal’ homozygotes – no malaria resistance, no anemia)? How would the change in sickle cell allele frequencies compare to scenario a (extirpation of malaria)

A researcher mutagenized a group of butterflies and isolated six butterflies with extra-long bodies. Each butterfly has a recessive mutation in only one gene. The researcher performed a complementation test using the six butterflies and got the following results, where "+" is wild-type body and "-" is extra-long body. 1 2 3 4 1 - 2 3 4 + ? + ? + 6 + + If the line 3 butterflies are crossed with the line 5 butterflies and they produce all extra-long bodies, what do you conclude about the butterflies produced from a cross between lines 1 and 5? There is not enough information to determine. None of the offspring will be mutant (extra long) Half of the offspring would have wild-type bodies and half of the offspring would have extra-long bodies. All of the offspring will be mutant (extra long) + + +

Who was Gregor Mendel? Describe the plant that he performed his research with and explain at least two reasons why this plant proved to be an ideal model species for early genetic research.

In a three-point linkage analysis, the RF (Recombinant Frequency) for three genes were determined as the following: genes A and B (RF=15%), genes B and C (RF=22%), genes A and C (RF=35%). Based on this analysis, which one of three genes is located in the middle? O gene B Ogene A O gene C O cannot be determined

a geneticist has obtained 2 true-breeding strains of mice, each homozygous for an independently discovered recessive mutation that prevents the formationof hair on the body. one mutant strain is called naked, and the other is hairless. to determine whether the 2 mutations are alleles, the geneticist crosses naked and hairless mice with each other. All the offspring lack hair on their bodies.   A: are naked and hairless mutations 2 different alleles? yes or no B: what type of experiment is this called

Yellow Spotted Marker 1 Marker 2 Marker 3 Marker 4 Black K8 KB KE KB I. Marker 1 Marker 2 Marker3 Marker KB k III. 1 7 8. 10 11 12 Marker 1 Marker 2 Marker 3 Marker 4 KB. -KB Gene K controls fur color and it has three alleles: B, s, and y. The pedigree shows the genotypes of the individuals in the K gene and the haplotypes for the four molecular markers in the region of the gene. a) what is the relationship between the three alleles? Use the pedigree to support your answer and refer to individuals by their positioning in the pedigree b) based on the pedigree and the haplotype at the four markers, where is gene K located? Support your answer. c) A genetic map of the 4 markers studied is shown below: Marker 1 Marker 2 Marker 3 Marker 4 JU 5 cM 6 cM 12 cM What is the probability that an offspring of a cross between l-1 and I-2 would have the haplotype below? Show your work. 3 1 1 1 1