Genetics Review

Front

In pea plants, the tall allele is dominant to the short allele. What is the correct representation of these alleles?

Back

Tall = T, Short = t

Front

What do we call the physical expression of the genetic material of an organism?

Back

Phenotype

Front

Which of the following genotypes is homozygous dominant? Yy, yY, yy, or YY?

Back

YY

Front

What is one form of a gene called?

Back

An allele

Front

What is the genotypic ratio of the offspring in a typical Mendelian cross?

Back

1:2:1

Front

What is the term for the genetic makeup of an organism?

Back

Genotype

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 is a trait?

Back

A trait is a characteristic or feature of an organism, which can be influenced by genetics.

Front

What is the purpose of a Punnett square?

Back

A Punnett square is used to predict the genotypes of offspring from a genetic cross.

Front

What does homozygous mean?

Back

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