Monohybrid and Dihybrid Flashcard

Front

What is the phenotypic ratio for a dihybrid cross between two heterozygous parents (EeRr)?

Back

9:3:3:1

Front

What does it mean to be heterozygous for a trait?

Back

Having two different alleles for a trait.

Front

Define phenotype in the context of genetics.

Back

The physical appearance of the trait.

Front

What is a recessive allele?

Back

An allele that is hidden by a dominant allele.

Front

In a cross between a heterozygous long-tusked elephant and a homozygous recessive short-tusked elephant, what is the probability of the offspring having short tusks?

Back

50%.

Front

What is the principle of independent assortment?

Back

The principle stating that alleles for different traits are distributed to gametes independently of one another.

Front

What is a Punnett square used for?

Back

To predict the genotypes and phenotypes of offspring from a genetic cross.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup, while phenotype refers to the physical expression of that genetic makeup.

Front

What does homozygous mean?

Back

Having two identical alleles for a trait.

Front

What is the significance of Mendel's experiments with pea plants?

Back

They established the basic principles of heredity, including the laws of segregation and independent assortment.