Heredity and DNA

What does a lowercase letter represent in a Punnett square?

• A dominant allele

• A recessive allele

• A heterozygous pair

• A phenotype

Answer explanation

A lowercase letter in a Punnett square represents a recessive allele.

What is a phenotype?

• The genetic makeup of an organism

• The physical appearance of an organism

• A type of gene

• A type of DNA molecule

Answer explanation

A phenotype refers to the physical appearance of an organism. Ex: Hair color, long tail, beak shape

Every living thing has genetic information stored in the form of

• Ribosomes

• DNA

• Chloroplast

• Mitochondria

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

If two alleles are the same for a certain trait they are considered

• Homozygous

• Twins

• Heterozygous

• Common

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Physical traits that are expressed are known as ____________

• Mutation

• Personality

• Genotype

• Phenotype

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Chromosomes are

• Found in the mitochondria

• Made of 20 pairs

• Long strands of DNA that contain many genes

• Bundles of DNA that contain only one gene each

Tags

NGSS.HS-LS3-1

Traits that are passed from parents to offspring are always

• Recessive

• Inherited

• Dominant

• Heterozygous

Tags

NGSS.HS-LS3-1

The passage of genetic instructions from one generation to the next is known as

• Alleles

• Ancestry

• Heredity

• Variation

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If a certain trait has two different alleles (one dominant and one recessive) it is called __________________

• Homozygous

• Confused

• Differentiated

• Heterozygous

Tags

NGSS.HS-LS3-1

This variation of a gene can only be expressed if it is received from both parents

• Shy

• Heterozygous

• Variation

• Recessive

Tags

NGSS.HS-LS3-1