Genetics Vocab & Intro to Punnett Squares

Front

What is the definition of PHENOTYPE?

Back

The physical trait of an organism.

Front

If A = red fur and a = white fur, what color fur would Aa be?

Back

Red.

Front

What is a Punnett Square used for?

Back

To predict the possible genotype from certain parents.

Front

How many total chromosomes do humans have?

Back

46.

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 and heterozygous parent?

Back

100% green pods.

Front

What does the term 'genotype' refer to?

Back

The genetic make-up of an organism.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their trait even if only one copy is present; recessive alleles require two copies to express their trait.

Front

What is a homozygous genotype?

Back

A genotype with two identical alleles for a trait.

Front

What is a heterozygous genotype?

Back

A genotype with two different alleles for a trait.

Front

What does it mean if an organism is homozygous dominant?

Back

It has two dominant alleles for a trait.