A number of true-breeding brown dogs were crossed with a true-breeding white breed. All the pups were brown. When several of the F1's were allowed to breed, the F2's were 92 brown, 58 black and 10 white. Provide a genetic explanation for these results and show the genotypes of the two original parents.

A number of true-breeding brown dogs were crossed with a true-breeding white breed. All the pups were brown. When several of the F1's were allowed to breed, the F2's were 92 brown, 58 black and 10 white. Provide a genetic explanation for these results and show the genotypes of the two original parents.

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

See similar textbooks

Similar questions

We are interested in detremining the genetic map of three different house finch traits: beak color (dark vs light), song length (short vs long) and patch size (reduced vs normal). We have done a large experiment involving the usual PO crossed, with the F1 test crossed. The following are the data for the offspring from the test cross: Beak Shade Patch Size Song Length Number Observed Dark Normal Long 67 Light Normal Long 3 Light Normal Short 498 Dark Normal Short 43 Dark Reduced Short 13 Light Reduced Short 80 Light Reduced Long 50 Dark Reduced Long 389 Choose the map below that best fits the data Beak Shade- 14.26CM- Patch Size- 9.54CM-Song Length O Patch Size-9.54cM- Beak Shade- 14.26CM-Song Length O Patch Size- 14.26cM- Beak Shade- 9.54CM-Song Length O Beak Shade-9.54cM-Patch Size- 14.26CM-Song Length O Patch Size-9.54CM- Song Length- 14.26CM-Beak Shade O Patch Size- 14.26cM-Song Length- 9.54cM-Beak Shade
In goats, black fur is dominant to red fur. The gene for this trait can be described as Bb (if you forgot why this is so, go back and reread the background information at the beginning of this exercise). A homozygous black female goat (nanny) is crossed with a heterozygous male (billy). 3 Using this information, fill in Punnett square A to predict the potential genotypes of offspring that could result from this cross. Fill input: Fill input: Fill input: Fill input: Fill input: Fill input Fill input: Fill input: Punnet Square A BB B Bb BB Bb B B
A breeder is interested in a new coat colour in mice. This trait is controlled by a single autosomal gene (Gene T) with two alleles. The T-allele results in a yellow coat colour, while the recessive allele causes a cream coat colour. The breeder has a yellow mouse. Can you suggest how the breeder can determine the genotype (TT or Tt) of his mouse in a single cross? Describe this cross and provide details on how you would interpret the results.
A farmer is interested in a new colour pattern in his breed of cattle. This trait is controlled by a single autosomal gene (Gene R) with two alleles. The R-allele results in a spotted colour pattern, while the recessive allele causes a solid colour. The farmer has a cow that has the spotted pattern. Can you suggest how the farmer can determine the genotype (RR or Rr) of his cow in a single cross? Describe this cross and provide details on how you would interpret the results.
In the red spotted butterfly there are two traits under investigation. The wing margin can be either notched (N) or straight (n) and the wing color can be either pale yellow (b) or bright yellow (B). A bright yellow male with straight wing margins was crossed with a bright yellow female with notched wing margins. All of the resulting progeny had notched wings and both color patterns were present. From these data determine the genotypes of the butterflies used in the original cross.