There is X-linked mutations in flies in this example. You need to determine the inheritence pattern of a mutant that causes hairy body. You mate hairy body males with females that are true breeders for normal bodies. All the offspring (F1) have normal bodies.
a.) The hairy body is dominant or recessive?
b.) What symbol will you use to represent the hairy allele?
c.) What symbol will you use to represent the normal allele?
d.) Determine the genotypes of the F1 offspring using a punnet square.
e.) Next you mate the F1 to produce F2. Use a punnet square to demonstrate this cross. Write out the genotypic and phenotypic ratios of the f2 generation.

The 'Y' is mentioned as it is because the linkage is X linked
In the phenotypic ratio (F2 Generation) one male is hairy and one is normal and both the females are also normal.
There is X-linked mutations in flies in this example. You need to determine the inheritence pattern...
The phenotype of vestigial (short) wings (vg) in Drosophila melanogaster is caused by an autosomal recessive mutant allele that independently assorts with an autosomal recessive mutant allele for hairy (h) body. A parental cross was made between a fly that is homozygous for normal wings with a hairy body and a fly with vestigial wings that is homozygous for normal body hair. The wild-type F1 flies were crossed to each other and produced 1536 offspring. The phenotypes of the F2...
The phenotype of vestigial (short) wings (vg) in Drosophila melanogaster is caused by an autosomal recessive mutant allele that independently assorts with an autosomal recessive mutant allele for hairy (h) body. A parental cross was made between a fly that is homozygous for normal wings with a hairy body and a fly with vestigial wings that is homozygous for normal body hair. The wild-type F1 flies were crossed to each other and produced 1536 offspring. The phenotypes of the F2...
A lab discovers a recessive mutation in fruit flies that makes them appear hairy, and they breed a true-breeding line of flies with this mutation. A different lab independently identifies a recessive mutation that causes hairy flies. What experiment, and what results, would lead you to conclude that the two mutations occur in the same gene? What results would lead you to conclude that the two mutations occur in two different genes? A 3rd lab independently discovers a mutant that...
BIO340 Recitation 5 Spring 2020 Your professor is having you look at two genes in Drosophila fruit flies to determine experimentally whether they are linked. One trait is eye color and two alleles are present at the gene: se+ is the wild-type allele for red eyes, and se is the mutant, recessive allele for sepia eyes. The second trait is body color and two alleles are present at this gene: e+ is the wild-type allele for grey body, and e...
In Drosophila, the X-linked recessive mutation vermillion (v) causes bright red eyes, in contrast to the brick-red eyes caused by the wild-type allele. A separate autosomal recessive mutation, brown (bw), causes flies to have brown eyes. Flies carrying both mutations have no eye pigmentation and are white-eyed. Determine the F1 and F2 phenotypic ratios for each sex from the following crosses: (a) brown females X vermillion males (b) white-eyed females X wild-type males
E10 from Brooker: In fruit flies, curved wings are recessive to straight wings, and ebony body is recessive to gray body. A cross was made berween true-breeding flies with curved wings and pray bodies and flies with straight wings and ebony bodies. The F1 offspring were then mated to flies with curved wings and ebony bodies to produce an F2 generation. A. Diagram the genotypes of this cross starting with the parental generation and ending with the Frencration B. What...
We crossed pure-bred female flies with yellow body and
forked-shaped bristles with male flies extra bristles. The
subsequent F1 flies showed all normal phenotypes except that all of
the F1 males are yellow-body. We crossed again the normal F1
females with males homozygous for yellow body, extra bristles, and
forked bristles as a testcross. The number of each category of F2
progeny is shown below. The mutant allele for yellow body is y; the
mutant allele for extra bristles is...
46. (7 points) Vanessa has obtained two true-breeding strains of
mice, each homozygous for an
independently discovered recessive mutation that prevents the
formation of hair on the body.
One of the mutant strains is called naked, and the other mutation
strain is called hairless. To
determine whether the two mutations are simply alleles for the same
gene, Vanessa crosses
naked and hairless mice with each other (cross 1). All the
offspring are phenotypically wild-
type.
A) What is the most...
The wings of wild type fruit flies (Drosophila) are full; two recessive mutant strains express a different wing structure – one with scalloped wings and the other with reduced wings (smaller than normal). These are caused by two different mutations in the same gene. This gene is called scalloped. The gene symbol for scalloped is sd, where sd+= wildtype wings sd1= scalloped wings and sd2 = reduced wings Reciprocal crosses between the mutant true-breeding strains produced the following results: Cross...
In Drosophila, the autosomal recessive brown eye color mutation
(b) displays interactions with both the X-linked recessive
vermilion mutation (v) and the autosomal recessive scarlet (s)
mutation. Flies homozygous for brown and simultaneously hemizygous
or homozygous for vermilion have white eyes. Flies simultaneously
homozygous for both the brown and scarlet mutations also have white
eyes. Flies that are wildtype at all 3 loci have wildtype eye
color. Flies that are homozygous or hemizygous for the recessive
mutant at only one...