Unit 7 Flashcard Review

Front

What is the phenotypic ratio for offspring that express the dominant trait (A) vs the recessive trait (a) in a typical monohybrid cross?

Back

3:1

Front

What does it mean to have two different genes for a trait?

Back

Heterozygous

Front

What is the genotypic ratio for the cross TT x Tt?

Back

1 TT: 2 Tt: 1 tt

Front

Using the FOIL method, what are the allele combinations for a parent with the genotype AaFF?

Back

AF, AF, aF, aF

Front

What are the possible genotypes when a homozygous dominant dog (BB) is crossed with a heterozygous dog (Bb)?

Back

50% BB and 50% Bb

Front

Define homozygous.

Back

Having two identical alleles for a trait.

Front

Define genotype.

Back

The genetic makeup of an organism.

Front

What is a Punnett square used for?

Back

To predict the genotypes of offspring from a genetic cross.

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.

Front

What does the term 'allele' refer to?

Back

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