Unit 7 Flashcard Review

Front

What does homozygous mean?

Back

Having two of the same genes for a trait (sometimes called purebred).

Front

What is the genotypic ratio from a Punnett square for a cross of AA x aa?

Back

1:2:1

Front

If a homozygous dominant dog (BB) is crossed with a heterozygous dog (Bb), what are the possible genotypes?

Back

50% BB and 50% Bb.

Front

Using the FOIL method, what are the allele combinations for AaFF?

Back

AF, AF, aF, aF.

Front

What does heterozygous mean?

Back

Having two different genes for a trait (sometimes called hybrid).

Front

What is a Punnett square used for?

Back

To predict the genotypes of offspring from a genetic cross.

Front

Define genotype.

Back

The genetic makeup of an organism, represented by the alleles it possesses.

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 the phenotypic ratio for a monohybrid cross of two heterozygous parents (Bb x Bb)?

Back

3:1.

Front

What does the term allele refer to?

Back

Different forms of a gene that can exist at a specific locus.