Question

which inheritance pattern results when parents with pure traits are crossed and the resulting offspring have traits that appear to be a blend of the parents traits?
○ incomplete dominance
○ codominance
○ mendelian inheritance
○ polygenic inheritance

Explanation:

• Incomplete dominance occurs when the heterozygous phenotype is a blend of the two homozygous phenotypes. For example, in snapdragons, crossing a red - flowered plant (RR) with a white - flowered plant (rr) gives pink - flowered (Rr) offspring.
• Codominance is when both alleles are expressed simultaneously in the heterozygote (e.g., AB blood type).
• Mendelian inheritance (dominance) has one allele completely masking the other (e.g., pea plant height where tall is dominant over short).
• Polygenic inheritance involves multiple genes influencing a single trait (e.g., human skin color).

Answer:

incomplete dominance