Lessons in Genetics

Who is Gregor Mendel

• an Austrian Monk from the mid 1800s who contributed to the study of Genetics

• The scientist who discovered the structure of DNA

• a British scientist who discovered penicillin

• The scientist who used X-Ray Crystallography to shed light on the structure of DNA

Tags

NGSS.HS-LS3-2

When an organism has two of the same alleles, it is called

• homozygous

• heterozygous

• recessive

• dominant

When an organism has two different alleles, it is called

• homozygous

• heterozygous

• recessive

• dominant

______ is the set of genes possessed by someone

• Karyotype

• Fingerprint

• Genotype

• Phenotype

In cattle the allele for cloven hooves (H) is dominant over the allele for mule-foot hooves (h). The phenotype for each trait is shown in this picture. What is the probability of cloven hooves in the offspring of parents that are heterozygous for the trait?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Which organic molecule is responsible for a baby having the same eye color as one of their parents?

• Proteins

• Carbohydrates

• Nucleic acids

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

an organism that has inherited a recessive allele for a genetic trait or mutation but does not display that trait or show symptoms of the disease.

• carrier

• heredity

• phenotype

• purebred

Traits that are masked by others are known as...

• recessive traits

• dominant traits

Homozygous is when...

• the alleles are the same

• the alleles are different

• the alleles are absent

• the alleles are present

Heterozygous is when...

• the alleles are the same

• the alleles are different

• the alleles are absent

• the alleles are present