REVIEW of Unit 7 Genetic Variation and Evolution Test

Generally, mutations that affect a single gene occur during which step?

• operation
• translocation
• replication
• transcription

Tags

NGSS.HS-LS3-2

Which type of mutation has no effect on phenotype?

• point
• silent
• frameshift
• chromosomal

Tags

NGSS.HS-LS3-2

What is the name for a mutation caused by a segment of one chromosome moving to a nonhomologous chromosome?

• deletion
• inversion
• duplication
• translocation

Nondisjunction causes which of the following?

• extra gene
• extra codon
• extra chromosome
• extra nitrogen base

Genetic variation can arise from a random change in the DNA of a gene. What is the name for this type of change?

• allele
• mutation
• gene flow
• gene pool

Tags

NGSS.HS-LS3-2

What type of mutation involves the insertion or deletion of one or more nucleotides in the DNA sequence?

• frameshift
• single-gene
• translocation
• chromosomal

Tags

NGSS.HS-LS3-2

Which of the following are agents in the environment that can change DNA or increase the frequency of mutation in organisms?

• thymine
• triglyceride
• mutagens
• repair enzyme

Tags

NGSS.HS-LS3-2

Which the of the following are mutagens?

• X-rays
• UV from sunlight
• processed foods and preservatives
• cleaning products and cosmetics

Tags

NGSS.HS-LS3-2

Which phrase describes the consequence that results from nondisjunction?

• mitosis cannot take place
• no gametes will be produced
• there will be too many gametes produced
• a gamete will receive too many or too few copies of a chromosome

Which of these describes the number of chromosomes found in people who have Down syndrome?

• 45 chromosomes
• 46 chromosomes
• 47 chromosomes
• no x chromosomes