Genetics Review

The scientific study of how traits are passed from parents to offspring

• Gene

• Allele

• Genetics

• Genotype

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Having two identical alleles for a particular gene.  An example would be inheriting freckles from both your mother and your father.

• Heredity

• Dominant

• Homozygous/purebred

• Heterozygous / Hybrid

Tags

NGSS.HS-LS3-1

Having two different alleles for a particular gene.  An example would be inheriting brown eyed alleles from your father but blue eyed alleles from your mother.

• Dominant

• Recessive

• Heterozygous / hybrid

• Homozygous / Purebred

Tags

NGSS.HS-LS3-2

A specific characteristic that an organism can pass to its offspring through its genes.  An example would be red hair.

• Phenotype

• Hybrid

• Gene

• Trait

Tags

NGSS.HS-LS3-1

Which of the following best describes a dominant allele?

• An allele that is masked by a recessive allele

• An allele that is expressed only in the homozygous state

• An allele that is always expressed when present

• An allele that is found only in males

In genetics, what do we call the physical appearance or visible traits of an organism?

• Genotype

• Phenotype

• Allele

• Chromosome

Tags

NGSS.HS-LS1-1

How many chromosomes do humans have?

• 46

• 21

• 10

Tags

NGSS.HS-LS3-1

What is the term for the physical and behavioral characteristics of an organism?

• Genotype

• Phenotype

• Allele

• Chromosome

In the context of genetics, what is a genotype?

• The physical appearance of an organism

• The set of genes in our DNA which is responsible for a particular trait

• A type of gene that is not expressed as a trait

• The study of heredity and the variation of inherited characteristics

Tags

NGSS.HS-LS3-1

Which of the following is a recessive trait in genetics?

• Brown eyes

• Blue eyes

• Dark hair

• Curly hair