A heterozygous gray rabbit is crossed with a homozygous dominant gray rabbit (B

Question

A heterozygous gray rabbit is crossed with a homozygous dominant gray rabbit (B white). a) What is the phenotypic ratio of offspring from this cross? (1.0 Point) b) What is the genotypic ratio of offspring from this cross? (1.0 Point) ) gray b 2) A breeding experiment was done with wheat beginning with a dark red-kerneled variety and a white-kerneled variety. When plants with these two extreme phenotypes were crossed, all the Fi plants produced light red kernels that were intermediate between the parents. What type of inheritance does this suggest? (1Point) a. polygenic b. incomplete dominance c. codominance d. X-linkage e. Y-linkage 3) The color alleles for the flowers of snapdragons exhibit incomplete dominance. The red color allele is denoted by R and white color allele is denoted r. A pure red snapdragon is crossed with a pure white snapdragon. What is the phenotypic ratio of offspring from this cross? (1.0 Point) c) d) What is the genotypic ratio of offspring from this cross? (1.0 Point)

Explanation / Answer

1) Genotype of heterozygous gray rabbit - Bb.
Genotype of homozygous gray rabbit - BB.
Cross between them BB X Bb.
Gametes formed B and B B and b.
Next generation

a) The phenotypic ratio - 1:1.

2 homozygous gray rabbit: 2 heterozygous gray rabbit.

b) The genotypic ratio - 1:1.

2 BB : 2Bb.

Male/Female B B B BB(homozygous gray rabbit) BB(homozygous gray rabbit) b Bb(heterozygous gray rabbit) Bb(heterozygous gray rabbit)

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