Bio.5c Genetics

Front

How many alleles does an offspring receive from each parent for a specific trait?

Back

One allele from each parent.

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, such as red hair.

Front

What is the genotype for a homozygous recessive trait?

Back

The genotype is represented as 'aa'.

Front

In a dihybrid cross, what is the probability of an offspring being tall and white if the ratio is 9:3:3:1?

Back

The probability is 3.

Front

What does incomplete dominance mean in genetics?

Back

Incomplete dominance means that the traits are blended together.

Front

Define genotype.

Back

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

Front

What is the difference between dominant and recessive alleles?

Back

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

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

What does it mean if an organism is homozygous?

Back

An organism is homozygous if it has two identical alleles for a specific trait.

Front

What does it mean if an organism is heterozygous?

Back

An organism is heterozygous if it has two different alleles for a specific trait.