Labrador retriever coat colour exhibits a pattern of inheritance called epistasis. ‘B’ defines fur colour and...

Labrador retriever coat colour exhibits a pattern of inheritance called epistasis. ‘B’ defines fur colour and ‘E’ defines deposition of pigment. P generation is a cross between parent1, Bbee, and parent2, bbEe. What are the genotype and phenotype ratios of the offspring?

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gladiator answered 2 years ago

Labrador retriever dogs have three coat colors: black, brown and yellow. The color of the pigment...

Labrador retriever dogs have three coat colors: black, brown and yellow. The color of the pigment deposited in the hairs is determined by a gene with two alleles (B or b). The B allele codes for black pigment and is dominant to the b allele which codes for brown. Another gene with two alleles (E or e) determines if the pigment created will be deposited into the hairs. If both copies (ee) are recessive, no pigment will be deposited (regardless...

A breeder has observed variations in coat colour and pattern in the guinea pigs she has...

A breeder has observed variations in coat colour and pattern in the guinea pigs she has bred over the years. Black coat colour (B) is dominant over red coat colour (b), and white spotted pattern (s) is recessive to solid pattern (S). a. What progeny will be produced from mating a male that is heterozygous black, and heterozygous solid with a red, homozygous solid female? Show the genotypes, phenotypes, and the phenotypic ratio b. A third trait for coat type,...

In Labrador retrievers coat color is controlled by two independently assorting loci. The B locus controls...

In Labrador retrievers coat color is controlled by two independently assorting loci. The B locus controls hair color; black (B) is dominant to chocolate (b). A second locus, E, allows for deposition of the color on the hairs. The homozygous recessive condition at this locus (ee) produces a yellow dog, regardless of whether the animal is BB, Bb, or bb. You discover that your female yellow Labrador is pregnant, and she delivers a litter of 5 black puppies, 2 chocolate...

In Labrador retrievers, there are 3 gene products involved in determining coat color: gene product B, gene...

In Labrador retrievers, there are 3 gene products involved in determining coat color: gene product B, gene product E, and gene product C. B produces a melanin pigment such that B/B and B/b will produce a black lab while b/b (with less melanin produced) will result in a chocolate lab. However, for the B gene to be expressed, a signaling hormone (gene E product) must be produced to activate transcription of the B gene. E is fully dominant to e (loss of function mutation). In...

Two genes, A/a and B/b, control fruit color in squash. The inheritance pattern for this trait...

Two genes, A/a and B/b, control fruit color in squash. The inheritance pattern for this trait fits one of the multiple gene types that we discussed in class. A homozygous plant with white fruit was crossed with a homozygous plant with yellow fruit. All the progeny had red fruit. When two F1 plants were crossed, the F2 consisted of 38 white, 27 yellow, and 89 red. (a) (2 pts) Which type of gene interaction do we see here? Explain your...

This is normally accomplished through methylation of a cytosine: a. paternal effect b. imprinting c. epistasis d. maternal inheritance e....

This is normally accomplished through methylation of a cytosine: a. paternal effect b. imprinting c. epistasis d. maternal inheritance e. aromatase

More males are affected by a disease with this inheritance pattern A. autosomal dominant B. X-linked...

More males are affected by a disease with this inheritance pattern A. autosomal dominant B. X-linked recessive C. X-linked dominant D. Y-linked E. none of these

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