Genetics Vocab & Intro to Punnett Squares

Front

What does the prefix 'hetero' mean?

Back

different

Front

What is a GENOTYPE?

Back

the genetic make-up of an organism

Front

What is a PHENOTYPE?

Back

the physical trait of an organism

Front

If A = green pods and a = yellow pods, what are the PHENOTYPIC RATIOS of the offspring of a cross between a homozygous dominant parent (AA) and a heterozygous parent (Aa)?

Back

100% green pods

Front

If A = green pods and a = yellow pods, what are the PHENOTYPIC RATIOS of the offspring of a cross between two homozygous recessive parents (aa)?

Back

100% yellow pods

Front

What is a Punnett Square?

Back

A diagram used to predict the outcome of a genetic cross.

Front

What does homozygous mean?

Back

Having two identical alleles for a trait (e.g., AA or aa).

Front

What does heterozygous mean?

Back

Having two different alleles for a trait (e.g., Aa).

Front

What is the purpose of a Punnett Square?

Back

To determine the probability of an offspring inheriting particular traits.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles mask the effect of recessive alleles in heterozygous conditions.