genetics and punnett squares

Front

What is the physical appearance of a trait called?

Back

Phenotype

Front

What is the genetic makeup of an organism called?

Back

Genotype

Front

What does it mean if an organism is homozygous?

Back

It has two identical alleles for a trait.

Front

What does it mean if an organism is heterozygous?

Back

It has two different alleles for a trait.

Front

What is a Punnett square used for?

Back

To predict the genotypes and phenotypes of offspring from a genetic cross.

Front

What is the probability of offspring having short tusks when a heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant?

Back

50%.

Front

If one parent is heterozygous (Aa) and the other is homozygous recessive (aa), what percentage of their offspring is expected to be heterozygous?

Back

50%.

Front

What is a genetic cross?

Back

The mating of two organisms to produce offspring.

Front

In a cross between two heterozygous white rabbits (where brown fur is recessive), what is the expected phenotype ratio of the offspring?

Back

75% white; 25% brown.

Front

What is the term for the passing on of physical or mental characteristics genetically from one generation to another?

Back

Heredity.