please help 37. Coat color in Labrador retrievers (one of the coolest of dog bre
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37. Coat color in Labrador retrievers (one of the coolest of dog breed,k and b - brown. This gene can res pigmentation is governed by one gene that occurs in two allelic forms: B- black black labs and brown labs (also called "chocolate labs"). However, anott pigmentation gene and this gene, too, comes in two allelic forms there is no expression of the pigmentation we get "yellow labs." A yell The resulting litters male also had blac male also had black lab and chocolate lab parents. (For credit you must show your work or explain your answers.) olest of dog breeds, in case you didn't know) involves epistasis. Coat two allelic forms: B - black, and b - brown. This gene can result in colate labs"). However, another gene affects the expression of the on. If : E- allows expression, and e - block ow lab female was crossed with a black lab male. A. What are the genotypes for the female and male dogs in this cross? (2 pts] 5 po B. What phenotypes and phenotypic ratio would you expect for this cross.Explanation / Answer
Labrador color is determined by the presence of genes B which gives black colour and b gene which gives brown color. The color expression is determined by the the alleles E and e. E allows color expression and e blocks color expression.
Yellow lab female is crossed with black lab male. The resulting litters included yellow lab pups. So, female has homozygous ee genotype and male has heterozygous Ee genotype.
Female parents were pure bred black lab (BBEe) and purebred chocolate lab (bbEe)
a) The genotype of female is Bbee and the genotype of male lab is BbEe.
b) Bbee X BbEe
Yellow, black and brown colored labs are produced in the ratio of 8:6:2.
C) 2 yellow and 1 black pup is expected among the 3 pups.
Be Be be be BE BBEe (black) BBEe (black) BbEe (black) BbEe (black) Be BBee (yellow) BBee (yellow) Bbee (yellow) Bbee (yellow) bE BbEe (black) BbEe (black) bbEe (brown) bbEe (brown) be Bbee (yellow) Bbee (yellow) bbee (yellow) bbee (yellow)Related Questions
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