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:

To determine the correct inheritance pattern, we analyze each option:

• Incomplete dominance: Occurs when the heterozygous phenotype is a blend of the two homozygous phenotypes. For example, a red flower (RR) and a white flower (rr) crossing to produce pink flowers (Rr), which matches the description of offspring having a blend of parents' traits.
• Codominance: Both alleles are fully expressed in the heterozygote (e.g., AB blood type), not a blend.
• Mendelian inheritance: Follows dominant - recessive patterns where one trait is dominant over the other, no blending.
• Polygenic inheritance: Involves multiple genes influencing a trait (e.g., height), not a blend of two parental traits.

Answer:

A. incomplete dominance