Monohybrid, dihybrid, mutations

Front

What is a monohybrid cross?

Back

A monohybrid cross is a genetic cross between two individuals that differ in a single trait, focusing on the inheritance of one gene.

Front

What is a dihybrid cross?

Back

A dihybrid cross is a genetic cross between two individuals that differ in two traits, focusing on the inheritance of two genes.

Front

Define homozygous. Give an example.

Back

Homozygous refers to having two identical alleles for a particular gene. Example: RR or rr.

Front

Define heterozygous. Give an example.

Back

Heterozygous refers to having two different alleles for a particular gene. Example: Rr.

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses.

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

What are mutations?

Back

Mutations are changes in the DNA sequence that can lead to variations in traits.

Front

What is a frameshift mutation?

Back

A frameshift mutation occurs when nucleotides are inserted or deleted from the DNA sequence, altering the reading frame.

Front

Why are frameshift mutations harmful?

Back

They change all of the codons from the mutation on down the line, which changes the amino acid sequence.

Front

What is the probability of obtaining a homozygous recessive offspring from a monohybrid cross of two heterozygous parents?

Back

25%.