Exploring Genetics: Traits and Inheritance

In a Punnett square, if one parent is homozygous dominant for a trait (AA) and the other is homozygous recessive (aa), what will be the genotype of the offspring?

• AA

• Aa

• aa

• Aa or aa

Which of the following best describes a heterozygous genotype?

• AA

• Aa

• aa

• A or a

If a trait is dominant, what does it mean in terms of phenotype?

• The trait will only appear if both alleles are recessive.

• The trait will appear if at least one dominant allele is present.

• The trait will never appear.

• The trait will appear only if both alleles are dominant.

In a case of incomplete dominance, if a red flower (RR) is crossed with a white flower (WW), what will be the phenotype of the offspring?

• Red

• White

• Pink

• Red and white

Which of the following is an example of codominance?

• A red and white flower producing pink flowers.

• A black and white chicken producing gray offspring.

• A black and white chicken producing offspring with both black and white feathers.

• A tall and short plant producing medium height plants.

What is the relationship between genotype and phenotype?

• Genotype determines phenotype.

• Phenotype determines genotype.

• They are unrelated.

• Genotype and phenotype are always identical.

In a Punnett square, what does each box represent?

• A possible genotype of the offspring.

• A possible phenotype of the offspring.

• The genotype of the parents.

• The phenotype of the parents.

If a plant is heterozygous for a trait (Tt), what are the possible gametes it can produce?

• T only

• t only

• T and t

• TT and tt

Which of the following is true about recessive traits?

• They are always expressed in the phenotype.

• They are only expressed when two recessive alleles are present.

• They are never expressed in the phenotype.

• They are expressed when at least one dominant allele is present.

In a case of incomplete dominance, what would be the expected phenotype ratio of the offspring from a cross between two heterozygous individuals (RW x RW)?

• 1:2:1

• 3:1

• 1:1

• 2:1