Question

Crossing pink flowering snapdragons with pink flowering snapdragons yields seeds that grow into
snapdragons with red, white, and pink flowers.
A) These mating results support the blending hypothesis of inheritance.
B) These mating results support the hypothesis that there are unblended discrete units of inheritance.

5) Crossing red flowering snapdragons with white flowering snapdragons yields seed that grow into snapdragons
with pink flowers.
A) These mating results support the blending hypothesis of inheritance.
B) These mating results support the hypothesis that there are unblended discrete units of inheritance.

Answer 1

4),(A)The  crossing between the snapdragons pink flowers will results in the production of red,pink and white flowers in the ratio(phenotypic ratio) 1 Red: 2 Pink: 1 Red.

genotypic ratio: 1RR:2Rr:1rr. These mating results support the blending hypothesis of inheritance because the phenotypic characters red and white are  not dominant and not recessive at all. so when the alleles R and r a comes together there will be blending of charcaters and thus results in the pink color flower. This is due to the Incomplete dominance.

(B),  These mating results support the hypothesis that there are unblended discrete units of inheritance ,however, there is no blending of alleles or genetic material but only the phenotypic characters are blended.therefore it is not a blending inheritance.

5),

(A),Due to Incomplete dominance, mixing of phenotype occures,thus the crossing between red and white flower results in the pink flower in the F1 generation.

(B),The pink color phenotype is due to blending of phenotype only, not the alleles or genetic material-which is unblended units.