Dihybrid Cross 10.2

Front

What is a dihybrid cross?

Back

A dihybrid cross is a genetic cross that examines the inheritance of two different traits, each represented by two alleles.

Front

What are the possible genotypes of the parents in a dihybrid cross?

Back

The possible genotypes can include combinations of homozygous and heterozygous alleles for both traits, such as YyRr, YYRR, etc.

Front

What is the phenotypic ratio expected from a dihybrid cross?

Back

The expected phenotypic ratio from a dihybrid cross is 9:3:3:1.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, either dominant or recessive.

Front

What does heterozygous mean?

Back

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

Front

What is the significance of the Punnett square in genetics?

Back

The Punnett square is a tool used to predict the genotypes and phenotypes of offspring from a genetic cross.

Front

How many different gametes can be produced by a dihybrid organism with genotype YyRr?

Back

A dihybrid organism with genotype YyRr can produce four different gametes: YR, Yr, yR, and yr.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup of an organism, while phenotype refers to the observable traits or characteristics.

Front

What is a recessive phenotype?

Back

A recessive phenotype is expressed only when an individual has two recessive alleles for a trait.

Front

What is the genotype for homozygous dominant for both traits in a dihybrid cross?

Back

The genotype for homozygous dominant for both traits is AABB.