Drosophila melanogaster (fruit flies) are excellent animals to use for studying Mendel’s laws of inheritance. Two...

Drosophila melanogaster (fruit flies) are excellent animals to use for studying Mendel’s laws of inheritance. Two Mendelian traits that are often used for these experiments are eye colour (encoded for by the ‘W’ gene) and wing shape (encoded for by the ‘Vg’ gene). The ‘W’ allele is dominant, and gives red eyes, while the ‘w’ allele is recessive and gives white eyes. The ‘Vg’ allele is dominant, and gives normal wings, while the ‘vg’ allele is recessive and gives vestigial wings (which are almost absent and have only a small amount of wing tissue). . Starting with a cross between a true breeding red-eyed, vestigial-winged fly (WW vgvg) and a true-breeding white-eyed, normal winged fly (ww VgVg): a. List the genotypes of the F1 flies. b. List the four types of gametes and their proportions (in percent) that these F1s will produce, assuming the two genes are unlinked, and classify them as parental or recombinant. c. List the four types of gametes and their proportions (in percent) if these genes had been on the same chromosome, 20 map units apart. d. Draw a Punnett square representing the cross between the F1 flies, assuming linkage between the Vg and W genes as described in part c. Then list the F2 genotypes and their proportions.

I have tried this question over and over and still do not understand it. Please dumb it down

Expert Solution

Please look in the image for solution:

gladiator answered 2 years ago

A researcher studying the effects of a certain pesticide on fruit flies (Drosophila melanogaster) in the...

A researcher studying the effects of a certain pesticide on fruit flies (Drosophila melanogaster) in the lab found that it binds to the spliceosomes (the enzymes that cut/splice the initial RNA transcripts) and caused the spliceosome to be non-functional. What effect would this have on the gene expression of the fruit flies?

You are studying 2 genes in Drosophila Melanogaster (fruit flies), Gene A and Gene B. Gene...

You are studying 2 genes in Drosophila Melanogaster (fruit flies), Gene A and Gene B. Gene A and Gene B are located on different chromosomes and therefore will undergo independent assortment. Both genes have two different alleles, a dominant allele and a recessive allele. For example: for Gene A there is a dominant allele A and a recessive allele a. Gene A determines body color and gene B determines eye color. In terms of body color, some of your flies...

Dihybrid crosses of (virtual) fruit flies (Drosophila melanogaster) were carried out at the computer lab at...

Dihybrid crosses of (virtual) fruit flies (Drosophila melanogaster) were carried out at the computer lab at this course. The mutant alleles studied were “vestigial wing” (vg) and “ebony body” (eb). The mutant P‐generation flies were homozygous recessive at both studied loci. The wild type alleles were homozygous dominant at both loci. The loci for vestigial wing and ebony body are located at separate chromosomes. Show the Punnett crosses from the P‐generation to the F1‐generation of mutant and wild type flies,...

Use the preamble below to answer Questions 27 and 28 In the fruit fly Drosophila melanogaster,...

Use the preamble below to answer Questions 27 and 28 In the fruit fly Drosophila melanogaster, red eye colour (R) is dominant to white eye colour (r). A student wishes to perform a test cross to determine whether a female red eyed fruit fly is homozygous or heterozygous for the eye colour. The student mates the female fruit fly with a red eye coloured male and studies the offspring, which are 100% red eye. The student concludes that the genotype...

1. A geneticist discovers a new mutation in Drosophila melanogaster that causes flies to shake and...

1. A geneticist discovers a new mutation in Drosophila melanogaster that causes flies to shake and shake. The geneticist gives this mutation the name of spastic (sps) and concludes that it is due to the presence of an autosomal recessive gene. You want to determine if the spastic gene is linked to a recessive gene for vestigial wings (eg). To do this, it crosses a homozygous fly for the spastic mutation and for vestigial characteristics with a homozygous fly for...

In the fruit fly, Drosophila melanogaster, a wingless female fly is mated to a male that...

In the fruit fly, Drosophila melanogaster, a wingless female fly is mated to a male that is white-bodied and legless. Assume that all alleles causing these phenotypes are recessive. Phenotypically wild-type F1 female progeny were mated to fully homozygous (mutant) males, and the following progeny were observed: Phenotypes Number Observed wingless 324 wild-type 34 white, wingless 135 white 8 white, legless 319 hairless, white, legless 32 hairless 140 hairless, legless 9 (a) With respect to the three genes mentioned in the problem, what are the genotypes...

In the fruit fly, Drosophila melanogaster, a spineless (sp, no wing bristles) female fly is mated...

In the fruit fly, Drosophila melanogaster, a spineless (sp, no wing bristles) female fly is mated to a male that is claret (cl, dark eyes) and hairless (h, no thoracic bristles). Phenotypically wild type F1 female progeny were mated to fully homozygous (mutant) males and the following progeny (1000 total) were observed. PHENOTYPES NUMBER OBSERVED spineless 316 wild 8 claret, spineless 136 claret 37 claret, hairless 304 hairless, claret, spineless 12 hairless 144 hairless, spineless 43 What is the correct gene map for these genes?...

In the fruit fly Drosophila melanogaster, wild type eye color is a brick red color and...

In the fruit fly Drosophila melanogaster, wild type eye color is a brick red color and is produced by the action of two genes, one producing red color, the other brown. Vermilion is an X-linked recessive mutation that results in a bright red eye. Brown is an autosomal recessive mutation that results in a brown eye. Flies carrying both the vermilion and brown mutations produce no pigment and have white eyes. True breeding Vermilion eyed females are crossed to brown...

4) In fruit fly (Drosophila melanogaster), grayish eye color and wingless bodies are caused by recessive...

4) In fruit fly (Drosophila melanogaster), grayish eye color and wingless bodies are caused by recessive genes located on different chromosomes. Red eyes (gr+) and normal wings (wl+) are dominant to gray eyes (gr) and wingless (wl), respectively. Suppose that a true-breeding male with gray eyes and normal wings is crossed with a true-breeding female with red eyes and wingless. a) What is the genotype and phenotype of the F1? b) If these F1 individuals were allowed to intermate, what...

The entire genome of the fruit fly Drosophila melanogaster consists of 1.65 x 108 base pairs...

The entire genome of the fruit fly Drosophila melanogaster consists of 1.65 x 108 base pairs (bp). If this organism’s DNA polymerase can copy DNA at the rate of 30 bp/sec calculate the minimum time (in days) required to replicate the entire genome. Remember there are 2 strands, and each are copied at the same time. 9,900,000,000 days 4,950,000,000 days 31.83 days 1909.7 days

Question