AP BIOLOGY

HEREDITY

SEX LINKAGE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If a red (RR) and white (rr) flower are crossed, resulting in 100% Rr, what phenotypes would be seen according to the rules of in-complete dominance.
A
red
B
white
C
pink
D
red and white
Explanation: 

Detailed explanation-1: -Answer: 1) The phenotype of Rr is Pink according to incomplete dominance. Incomple dominance occurs when none of the alleles is completely dominant over the other, resulting in blending of the phenotype from the parents. When a red (RR) and a white flower (rr) are crossbred, they result in Rr that is a pink phenotype.

Detailed explanation-2: -Figure 21: A cross between a red and white snapdragon will yield 100% pink offspring. This pattern of inheritance is described as incomplete dominance, meaning that neither of the alleles is completely dominant over the other: both alleles can be seen at the same time.

Detailed explanation-3: -Complete dominance: if a red (RR) and a white flower (rr) were bred, resulting in 100% heterozygous offspring (Rr), what phenotype would be seen according to the rules of COMPLETE dominance? Heterozygous phenotype: Red flower b.

Detailed explanation-4: -The crossing of a red flowered plant and a white flowered plant produces all the offspring with pink flowers. This cross illustrates red and white exhibit incomplete dominance. This situation occurs due to the blending of both the alleles.

Detailed explanation-5: -In complete dominance, only one allele in the genotype is seen in the phenotype. In codominance, both alleles in the genotype are seen in the phenotype. In incomplete dominance, a mixture of the alleles in the genotype is seen in the phenotype.

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