Unit 3 Topic 2 Vocabulary

What is an allele?

• A type of cell

• A form of a gene that controls a characteristic

• A type of protein

• A type of chromosome

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following is an example of an allele?

• X or Y

• T or t

• A or B

• G or C

Tags

NGSS.HS-LS3-2

Diagram showing homologous chromosomes with different alleles labeled (e.g., T, t, a, A) and types of alleles (homozygous dominant, heterozygous, homozygous recessive). Which of the following correctly describes a heterozygous allele pair?

• Tt

• TT

• tt

• AA

Tags

NGSS.HS-LS3-1

What is a dominant allele?

• An allele that is never expressed

• An allele that is fully expressed whenever it is present

• An allele represented with a lowercase letter

• An allele that is only expressed in the absence of another allele

How is a dominant allele represented?

• With a lowercase letter

• With a number

• With a capital letter

• With a symbol

What is a recessive allele?

• An allele that is always expressed

• An allele that is expressed only when no dominant allele is present

• An allele represented with uppercase letters

• An allele that is never expressed

How is a recessive allele represented?

• With uppercase letters

• With numbers

• With lowercase letters

• With symbols

What is a genotype?

• The physical appearance of an organism

• The combination of genes for one or more specific traits

• The environment affecting an organism

• The diet of an organism

Tags

NGSS.HS-LS3-1

Which of the following is an example of a genotype?

• Tall

• Blue eyes

• Aa, AA, aa

• Green leaves

What does the term "phenotype" refer to?

• Genetic makeup of an organism

• Physical appearance of a trait

• The environment of an organism

• The diet of an organism