Practice for Mission 14: Patterns of Inheritance Quiz

A pea plant has purple flowers (Pp). Its parent with purple flowers is homozygous dominant (PP). What does this tell us about the inheritance pattern?

• The heterozygote shows a blend of purple and white
• Both alleles are equally expressed in the offspring
• Purple is completely masking the white color, showing Mendelian inheritance
• The purple color must be recessive

In snapdragons, a Red (RR) flower is crossed with a White (WW) flower, producing Pink (RW) offspring. Why are the offspring pink instead of red or white?

• Both alleles are equally dominant and expressed together
• The red allele is masking the white allele
• The pink color is a recessive trait
• Red and white are blending together in incomplete dominance

A student observes that a heterozygous animal has both red and white hairs scattered throughout its coat. Which inheritance pattern does this demonstrate?

• Co-dominance where both traits are expressed distinctly
• A mutation in the animal's genes
• Mendelian inheritance with red as dominant
• Incomplete dominance creating a pink coat

If you wanted to determine whether a trait shows Mendelian inheritance or incomplete dominance, what would be the most important thing to observe?

• The age of the parents
• The color of the homozygous dominant parent
• The number of offspring produced
• The phenotype of the heterozygote individual

A heterozygous flower shows a phenotype that is exactly like its homozygous dominant parent. What can you conclude about this inheritance pattern?

• It must be incomplete dominance
• The recessive allele is actually dominant
• It shows co-dominance
• It demonstrates Mendelian inheritance with complete dominance

In roan cattle, an animal with genotype RW (Red and White alleles) has both red and white hairs. How is this different from a snapdragon with genotype RW that appears pink?

• There is no difference between these two examples
• The cattle have a recessive trait and the snapdragons have a dominant trait
• The cattle are homozygous and the snapdragons are heterozygous
• The cattle show co-dominance with distinct traits, while snapdragons show incomplete dominance with blended traits

A scientist discovers a new plant where the heterozygote (Aa) always shows both the yellow and blue colors in distinct stripes. Which inheritance pattern is this plant most likely demonstrating?

• Incomplete dominance
• Mendelian inheritance
• Co-dominance
• A blend of all three patterns

Why would a heterozygous pea plant (Pp) with purple flowers look identical to a homozygous dominant pea plant (PP) with purple flowers?

• Because the recessive allele is hidden by the dominant allele in Mendelian inheritance
• Because the recessive allele becomes dominant in heterozygotes
• Because both alleles are equally expressed
• Because incomplete dominance makes them blend together

A gardener observes three types of flowers: some are completely red, some are completely white, and some are pink. What inheritance pattern would best explain why pink flowers appear as an intermediate color?

• Mendelian inheritance with red as dominant
• Incomplete dominance where alleles blend
• A mutation creating a new color
• Co-dominance with distinct patterns

If a heterozygous animal shows BOTH red spots AND white spots on its fur (not a blend), which inheritance pattern is being demonstrated?

• Co-dominance
• Incomplete dominance
• Recessive inheritance
• Mendelian inheritance