Question

question 12
if red flower color (r) is incompletely dominant to white flower color (r), then what is the genotype of pink flowers?
a rr
b rr
c rr
d the genotype depends on the genotype of a modifier gene.
e the genotype cannot be determined.
question 13
up to 40% of human height can be attributed to environmental rather than genetic factors; thus, we call height inheritance is _
a polygenic.
b codominant.
c recessive.
d multifactorial.
e dominant.

Explanation:

• Question 12: In incomplete dominance, the heterozygous genotype (Rr) shows an intermediate phenotype. RR would be red (homozygous dominant) and rr would be white (homozygous recessive). There is no modifier gene mentioned, and the genotype can be determined as Rr for the intermediate (pink) phenotype.
• Question 13: Multifactorial inheritance means that a trait is influenced by both genetic and environmental factors. Polygenic just refers to multiple - gene inheritance (without emphasizing the environment). Codominant, recessive, and dominant are about allele interactions (not about the environment - gene interaction).

Answer:

• Question 12: C. Rr
• Question 13: D. multifactorial