Mendelian Genetics Review

A feature regulated by a set of genes (allele) passed on

from parents to offspring. Also called inherited traits.

• Heterozygous

• Mendel

• Chromosome

• Traits

Passing on traits from parents to offspring

• Chromosome

• Genotype

• Heredity

• Allele

The study of heredity

• Genetics

• Genome

• Allele

• Punnett Square

A genotype where only dominant alleles were passed on

from both parents for one trait

BB AA TT LL

• Homozygous Recessive

• Homozygous Dominant

• Dihybrid

• Heredity

A genotype where only recessive alleles

were passed on from both parents for one trait

bb aa tt ll

• Heredity

• Homozygous Dominant

• Homozygous Recessive

• Phenotype

The observable traits dictated by the genotype

• Phenotype

• Genotype

• Homozygous Recessive

• Homozygous Dominant

The genetic cross between two parents for one trait:

Example BB x bb

B = dominant for brown

b = recessive for blue

• Incomplete Dominance

• Dihybrid Cross

• Monohybrid Cross

• Iron Cross

What is the percentage of homozygous recessive offspring?

• 0%
• 25%
• 50%
• 75%

What percentage of the offspring will be purebred dominant?

• 0%
• 25%
• 50%
• 75%

True or False:
A heterozygous dominant trait can be written as BB.

• True
• False