genetics and punnett squares

Front

What is the physical appearance of an organism called?

Back

Phenotype

Front

What does heterozygous mean?

Back

The alleles are different.

Front

In a Punnett square, if T = tall and t = short, what is the genotype of a homozygous recessive organism?

Back

tt

Front

What is required for a recessive trait to appear in an organism?

Back

Two recessive alleles.

Front

If two heterozygous white rabbits are crossed, what is the expected phenotype ratio of their offspring?

Back

75% white; 25% brown.

Front

What is the term for an organism with two identical alleles for a trait?

Back

Homozygous.

Front

What is the term for an organism with two different alleles for a trait?

Back

Heterozygous.

Front

In genetics, what does the term 'allele' refer to?

Back

Different forms of a gene.

Front

What is the expected genotype ratio from a cross between two heterozygous parents (Tt x Tt)?

Back

1 TT : 2 Tt : 1 tt.

Front

What is the definition of genotype?

Back

The genetic makeup of an organism.