Genetics Day 2 Review

Front

What does a shaded circle represent on a pedigree?

Back

Affected female

Front

What does a shaded square represent on a pedigree?

Back

Affected male

Front

If B=Hair, b=bald, what is the percent chance of the offspring being bald if both parents are Bb?

Back

25%

Front

What is the term for an organism's physical appearance or visible traits?

Back

Phenotype

Front

What does a shaded symbol represent in a pedigree?

Back

Individuals that express a recessive trait.

Front

What is the genotype of an individual with a recessive phenotype?

Back

aa

Front

What is the genotype of an individual with a dominant phenotype that could be either homozygous or heterozygous?

Back

AA or Aa

Front

What is the definition of genotype?

Back

The genetic makeup of an organism, represented by alleles.

Front

What is the difference between dominant and recessive traits?

Back

Dominant traits are expressed in the phenotype even if only one allele is present; recessive traits require two copies to be expressed.

Front

What is a Punnett square used for?

Back

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