Heredity Quiz Study Guide

What are segments (parts) of DNA on a chromosome that codes for a specific trait called?

• genes
• chromosomes
• alleles
• nucleus

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

A form of a gene that is always expressed as the trait when it is present is called?

• recessive
• dominant
• allele
• genotype

The genetic makeup of an organism (such as Aa) is called?

• DNA
• genotype
• phenotype
• allele

Tags

NGSS.HS-LS3-2

A gene composed of two different alleles is called?

• heterozygous
• homozygous
• genotype
• phenotype

Tags

NGSS.HS-LS3-2

A gene composed of two identical alleles is called?

• heterozygous
• homozygous
• phenotype
• genotype

The physical traits produced by the genotype; the expression of genes is called?

• genotype
• mutation
• phenotype
• Punnett square

A mathematical model that predicts the probability of possible genotypes and phenotypes is called?

• Punnett square
• population
• graph
• chart

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

A form of a gene that is expressed only when a dominant allele is not present is called?

• variation
• evolution
• dominant
• recessive

If an organism is homozygous dominant for a trait, what could its genotype look like?

• RR

• Rr

• rr

• All of the above

If an organism is homozygous recessive for a trait, what could its genotype look like?

• TT

• Tr

• tt

• All of the above