Mendel, Genetics, Punnett Squares

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences.

Front

What does 'T' and 't' represent in genetics?

Back

'T' represents the dominant trait (tall), while 't' represents the recessive trait (short).

Front

True or False: The dominant trait is represented by a lowercase letter.

Back

False. The dominant trait is represented by an uppercase letter.

Front

What is an example of a dominant trait in pea plants?

Back

Yellow pea seeds are an example of a dominant trait.

Front

What is a Punnett Square used for?

Back

A Punnett Square is used to predict the genotypes and phenotypes of offspring from a genetic cross.

Front

If a parent has genotype Tt and the other has tt, what are the possible genotypes of the offspring?

Back

The possible genotypes are Tt and tt.

Front

What is the ratio of phenotypes in a monohybrid cross between two heterozygous parents (Tt x Tt)?

Back

The phenotype ratio is 3:1 (3 tall: 1 short).

Front

Define genotype.

Back

Genotype is the genetic constitution of an individual, represented by the alleles inherited from the parents.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene (e.g., TT or tt).

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene (e.g., Tt).