Question

suppose a plant that is homozygous for red flowers is crossed with a plant that is homozygous for white flowers. the offspring have some red areas and some white areas. this is an example of ________.

• incomplete dominance
• polygenic traits
• codominance
• sex - linked genes

question 10
10 pts
an example of ________ is the color of betta fish. when a red fish (gg) is crossed with a yellow fish (gg), all of the offspring will be a orange color (gg).

• incomplete dominance
• polygenic traits
• codominance
• sex - linked genes

Explanation:

First Question (Flower Cross)

• Incomplete dominance shows a blended phenotype (e.g., pink from red and white), but here the offspring has both red and white areas, not a blend.
• Polygenic traits are controlled by multiple genes, not relevant here.
• Sex - linked genes are related to sex chromosomes, not this case.
• Codominance is when both alleles are expressed fully, so the offspring having both red and white areas is codominance.

• Incomplete dominance occurs when the heterozygous phenotype is a blend of the two homozygous phenotypes. A red (GG) and yellow (gg) betta fish crossing to produce orange (Gg) offspring is a blend, so it's incomplete dominance.
• Polygenic traits involve multiple genes, not here.
• Codominance would show both traits fully (e.g., red and yellow spots), not a blend.
• Sex - linked genes are related to sex chromosomes, not this case.

Answer:

C. codominance

Second Question (Betta Fish Color)