8th-Ch 2:2 -Understanding Inheritance

Front

What is a Punnett square?

Back

A model used to predict the possible genotypes and phenotypes of offspring from a genetic cross.

Front

What does homozygous mean?

Back

The two alleles in a genotype are the same.

Front

What is the phenotype of an organism?

Back

The actual expression of a trait.

Front

What does heterozygous mean?

Back

The two alleles in a genotype are different.

Front

If a plant has the genotype Pp, what is its phenotype?

Back

It is purple, assuming P is dominant for purple color.

Front

How many offspring will be purple with a cross between (P,p) and (p,p)?

Back

50% of the offspring will be purple.

Front

What is the genotype of a homozygous recessive organism?

Back

The genotype is 'pp'.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup, while phenotype refers to the physical expression of traits.

Front

What does it mean if an organism is described as 'codominant'?

Back

Both alleles in the genotype are expressed equally in the phenotype.

Front

What is a trait?

Back

A characteristic that is inherited from parents to offspring.