Mendel and the Gene Idea Flashcards

Flashcards based on lecture notes about Mendel's experiments and genetics.

Character

A feature that varies among individuals.

Recessive Trait

Trait that is masked in the presence of a dominant trait.

F2 Generation

The generation resulting from a cross between the F1 generation.

Approximately 3:1

What phenotypic ratio did Mendel observe in the F2 generation for monohybrid crosses?

Principle of Segregation

The principle that two alleles for a heritable character segregate during gamete formation and end up in different gametes

Principle of Independent Assortment

The principle stating that alleles of two or more different genes assort independently of one another during gamete formation.

Dihybrid Cross

A cross involving two characters.

AaBb (double heterozygote)

What is the genotype of the F1 generation in a dihybrid cross between AABB and aabb?

9:3:3:1

What phenotypic ratio is observed in the F2 generation of a dihybrid cross when both parents are heterozygous?

Trihybrid Cross

A cross involving three characters.

8

How many types of gametes are produced by an AaBbCc individual?

Polyhybrid Cross

A cross involving multiple genes.

4^n

What is the number of zygotes in a polyhybrid cross with n genes linked?

(1:2:1)^n

Genotype ratio in a polyhybrid cross.

(3:1)^n

Phenotype ratio in a polyhybrid cross