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In rabbits, a series of multiple alleles controls coat color in the following way: C is dominant to all other alleles and causes full color. The chinchilla
For each case, determine the genotypes of the P1 generation and the F1 offspring, and predict the results of making each indicated cross between F1 individuals.
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- In chickens, a dominant hereditary abnormality (e.g., creepers) causes death when the genotype is homozygous (CC). The recessive condition (cc) at this locus produces a normal phenotype. Another gene locus with co dominant alleles is known to govern feather color such that the genotype FF = black, ff = splashed white, and Ff = blue. Also, a completely dominant gene W produces white skin. Yellow skin is produced by the homozygous genotype ww. QUESTIONS: In CcFfWw x ccffWw, what proportion of the offspring is: b.2 normal, white feathered, white skinned b.3 yellow skinnedarrow_forwardIn rabbits, an allelic series helps to determine coat color: C (full color), cch (chinchilla; gray color), ch (Himalayan; white with black extremities), and c (albino; all white). The C allele is dominant to all others, cch is dominant to ch and c, ch is dominant to c, and c is recessive to all the other alleles. This dominance hierarchy can be summarized as C > cch > ch > c. Indicate the phenotypic ratios expected in rabbits with the cross cchch × chc. 1 full color:1 chinchilla 1 full color:1 Himalayan 1 chinchilla:1 Himalayan 3 full color:1 chinchilla 2 full color:1 Himalayan:1 albinoarrow_forwardBronze coloured turkey is controlled by a dominant allele, B. Red coloured turkey is homozygous for a recessive allele bb. Dominant gene N produce normal feather and recessive genotype produce ‘hairy’ feather nn. In a cross between homozygous bronzed coloured turkey with ‘hairy’ feather and homozygous red coloured turkey with normal feather. What are the ratios of F2 progeny with Bbnn genotypes? (I want to check if what i'm doing is correct)arrow_forward
- In the guinea pig, one locus involved in the control of coat color may be occupied by any of 4 alleles: C (full color), ck (sepia), cd (cream), or ca (albino). The order of dominance is C > ck > cd > ca. A sepia pig was crossed with a cream pig, where the sepia pig had 2 full-color parents & the cream pig had 2 sepia parents. One of the piglets from this cross was albino. What phenotypic ratio is expected from this cross? A) All sepia piglets B) 1/2 full color : 1/4 sepia : 1/4 cream piglets C) 1/2 cream : 1/2 albino piglets D) 1/2 sepia : 1/4 cream : 1/4 albino piglets E) 3/4 sepia & 1/4 cream piglets F) All cream piglets G) 1/2 sepia : 1/2 cream pigletsarrow_forwardLabrador retrievers have 3 varieties of fur colour: yellow, chocolate or black. Two genes are involved, each with a dominant (Y and B) and a recessive allele (y and b). The allele Y codes for the ability to produce hair pigment: Yy and YY dogs have dark pigmented fur but all yy individuals are lighter coloured and yellow. The B allele codes for the ability to make hair with the darkest colouration: BB and Bb individuals have black fur; bb dogs have a lighter shade which is chocolate. In the blank Punnet Square below, calculate and state the ratio of phenotypes that occur with a cross between two individuals with the genotype YyBb.arrow_forwardIn rabbits, the gene for fur color is multiallelic. Agouti (C) is dominant to chinchilla (Cch), chinchillas is dominant to himalaya (Ch), and himalaya is dominant to albino (c). Determine the genotypes of each corresponding phenotypes. Please show the solution.arrow_forward
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