Single Factor Crosses and Genetic Vocabulary Revieww

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

Which genotype is considered heterozygous?

Back

Ff

Front

What segment of DNA codes for a trait?

Back

Gene

Front

What are different forms of a gene called?

Back

Alleles

Front

What does it mean to be homozygous?

Back

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

Front

What is the definition of a phenotype?

Back

The observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences.

Front

What is a genotype?

Back

The genetic constitution of an individual, often represented by letters (e.g., AA, Aa, aa).

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their trait even if only one copy is present, while recessive alleles require two copies to express their trait.

Front

What does it mean for an organism to be heterozygous?

Back

Having two different alleles for a specific gene (e.g., Aa).

Front

What is a Punnett square used for?

Back

A tool used to predict the genotypes and phenotypes of offspring from a genetic cross.