Genetics/Meiosis Review

Front

What is a recessive allele?

Back

A recessive allele is an allele that is only expressed in the phenotype when two copies are present in an individual.

Front

When is a recessive allele expressed in offspring?

Back

When two copies are present.

Front

What do the letters inside the grid of a Punnett square represent?

Back

The genotypes of offspring.

Front

What is a Punnett square used to predict?

Back

Possible genotypes and phenotypes of offspring.

Front

What is the genotype of a homozygous dominant individual?

Back

The genotype is represented by two identical dominant alleles, e.g., TT.

Front

What is the genotype of a homozygous recessive individual?

Back

The genotype is represented by two identical recessive alleles, e.g., tt.

Front

What does heterozygous mean?

Back

An individual with two different alleles for a particular gene, e.g., Tt.

Front

What is the probability of an offspring being tall when crossing Tt (heterozygous) with tt (homozygous recessive)?

Back

50% or 2 out of 4.

Front

What is the phenotype of an individual with genotype TT?

Back

The phenotype is tall.

Front

What is the phenotype of an individual with genotype tt?

Back

The phenotype is short.