Genetics and Heredity

Front

What is a homozygous recessive allele?

Back

A homozygous recessive allele consists of two identical recessive alleles, represented as 'tt'.

Front

How is a dominant allele represented?

Back

A dominant allele is represented by a capital letter.

Front

What does a lower case letter represent in a Punnett square?

Back

A lower case letter represents a recessive allele.

Front

What is the expected ratio of homozygous recessive offspring from a cross of two heterozygous parents (Tt x Tt)?

Back

The expected ratio is 1 in 4 or 25%.

Front

How is a recessive allele represented?

Back

A recessive allele is represented by a lower-case letter.

Front

What is the definition of genotype?

Back

Genotype refers to the genetic makeup of an organism, specifically the alleles it possesses.

Front

What is the definition of phenotype?

Back

Phenotype refers to the observable characteristics or traits of an organism, influenced by its genotype.

Front

What is a Punnett square used for?

Back

A Punnett square is used to predict the genetic outcomes of a cross between two organisms.

Front

What is the difference between homozygous and heterozygous alleles?

Back

Homozygous alleles are identical (e.g., TT or tt), while heterozygous alleles are different (e.g., Tt).

Front

What does it mean for an allele to be dominant?

Back

A dominant allele is one that expresses its trait even when only one copy is present in the genotype.