Question

In silkmoths (Bombyx mori), red eyes (re) and white-banded wings (wb) are encoded by two mutant...

In silkmoths (Bombyx mori), red eyes (re) and white-banded wings (wb) are encoded by two mutant alleles that are recessive to those that produce wild-type traits (re+and wb+); these two genes are on the same chromosome. A moth homozygous for red eyes and white-banded wings is crossed with a moth homozygous for the wild-type traits. The F1 have normal eyes and normal wings. The F1 are crossed with moths that have red eyes and white-banded wings in a testcross. The progeny of this testcross are

wild-type eyes, wild-type wings

418

red eyes, wild-type wings

19

wild-type eyes, white-banded wings

16

red eyes, white-banded wings

426

a. What phenotypic proportions would be expected if the genes for red eyes and for white-banded wings were located on different chromosomes?

b. What is the rate of recombination between the genes for red eyes and those for white-banded wings?

Science   Biology   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Phenotypic proportion of each type (1/4)

B) Rate of recombination={ (19+16) /(418+426+19+16) }×100=(35/879) ×100=3.9 ~4%

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Red eyes and curly wings are dominant traits in the fruit flies. True-breeding flies with red...
Red eyes and curly wings are dominant traits in the fruit flies. True-breeding flies with red eyes and curly wings were crossed to true-breeding flies with white eyes and vestigial wings. The F1 generation flies, which had red eyes and curly wings, were mated to each other. What is the probability of obtaining the following seven flies in the F2 generation: four that have red eyes and vestigial wings; one with red eyes and curly wings, and two with white...
Cinnabar eyes (ci), curved wings (cw) and smooth abdomen (sa) are all genes linked in the...
Cinnabar eyes (ci), curved wings (cw) and smooth abdomen (sa) are all genes linked in the order given on chromosome II of Drosophila. The three mutant alleles are all recessive to the wild-type alleles (ci+ wild type eyes; cw+ straight wings; sa+ normal abdomen). A female heterozygous for the mutant alleles at each locus is crossed to a homozygous recessive male (ci cw sa/ci cw sa). They have the following progeny: Phenotype                                                                        Number Cinnabar eyes, straight wings, normal abdomen...
If red eye and vestigial-wing female fly are crossed toa  pure-breeding white-eyed normal winged male fly and...
If red eye and vestigial-wing female fly are crossed toa  pure-breeding white-eyed normal winged male fly and generate F1 progeny. and those F1 males and females are crossed, what proportion of the F2 progeny will be red-eyed and female, with vestigial wings in fractional form vesgital is reccesive, it autosomal and white eyes is reccesive to red
A male fly that is homozygous for both red eyes (A) and normal wings (B) mates...
A male fly that is homozygous for both red eyes (A) and normal wings (B) mates with a female fly that has apricot (a) eyes and pointed wings (b). Both traits are controlled by autosomal alleles. What is the expected phenotype for the flies in the F1 generation? Group of answer choices AaBb red/pointed apricot/pointed aaBB red/normal
Two corn homozygous, white-seeded corn lines were crossed and all progeny were red-seeded. These red-seeded F1...
Two corn homozygous, white-seeded corn lines were crossed and all progeny were red-seeded. These red-seeded F1 progeny were selfed, and the population segregated 9 red-seeded:7 white-seeded. Explain these results by determining the number of genes controlling seed coat colors and giving the genotypes of the parents.
A cross between a fruit fly with wild type traits of red eyes and long aristae...
A cross between a fruit fly with wild type traits of red eyes and long aristae (antennae) and a double mutant parent with brown eyes and short aristae resulted in the following offspring progeny: 136 red eyes , long aristae, 154 brown eyes, short aristae, 702 red eyes, short aristae, and 765 brown eyes, long aristae. a) Calculate the recombination frequency. In your response, please write out the equation and show your calculations for full credit. b) Are the two...
23. You have two pure breeding fruit flies, with a wing shape that can be can...
23. You have two pure breeding fruit flies, with a wing shape that can be can be either normal (N) or (Vesgial) (n) and have Red Eyes or (R) or white (r).  A normal and white fly is crossed with a vestigial red eyed fly. The resulting F1 plats are crossed. A total of 640 F2 progeny are phenotypically observed: (16 Points) 360 Normal and Red 120 Normal and White 120 Vestigial and Red   40 Vestigial and White What is the...
In drosophila (fruit flies), eye colour is sex-linked and red eye colour is dominant to white...
In drosophila (fruit flies), eye colour is sex-linked and red eye colour is dominant to white eye colour. In a cross between a red-eyed male and a heterozygous female, what is the probability of producing white eyed female? ___________ [2 Marks] 8. Black fur in grasscutter (B) is dominant to brown fur (b.) Short tails (T) are dominant to long tails (t). What fraction of the progeny of the cross BbTt x BBtt will have black fur and long tails?...
Please answer all the questions, they're related The autosomal recessive allele bw, for brown eyes in...
Please answer all the questions, they're related The autosomal recessive allele bw, for brown eyes in Drosophila interacts with the X-linked recessive allele, v, for vermilion eyes, since flies that are recessive for both genes have white eyes. Wild type flies have red eyes. What eye color phenotypes, in what proportions, would be expected in the progeny from a cross of a white-eyed female and a brown eyed male?  Choose the best answer. Select one: a. all females with brown eyes,...
"The orange locus in cats is located on the X chromosome. In females, XoXo results in...
"The orange locus in cats is located on the X chromosome. In females, XoXo results in orange cats and X+X+ results in black cats When a female is heterozygous XoX+, they express both colors in patches due to a phenomenon called X-inactivation in which one X in every cell is inactivated. These females are called calico or tortoiseshell, depending on the presence of white spots. Male cats are either orange (XoY) or black (X+Y). A cross between a black female...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT