Genetics

Front

What is genetics?

Back

Genetics is the study of heredity and the variation of inherited characteristics.

Front

What is an allele?

Back

An allele is a variant form of a gene that can produce different traits.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene.

Front

What is a Punnett Square?

Back

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

Front

What is the genotypic ratio of a cross between two heterozygous plants (Tt x Tt)?

Back

1:2:1

Front

What is the phenotypic ratio of a cross between two heterozygous plants (Tt x Tt)?

Back

3:1

Front

How many alleles does an offspring receive from each parent?

Back

One allele from each parent.

Front

What is the expected fraction of offspring with white hair from a cross of WW and ww horses?

Back

All offspring will have white hair.

Front

What is the difference between dominant and recessive traits?

Back

Dominant traits are expressed when at least one dominant allele is present; recessive traits are expressed only when two recessive alleles are present.