Genetics and Evolution Worksheet — Grade 13

What is responsible for the variation of body plans seen in organisms?

• Mutations

• Hox gene

• Artificial selection

• Natural selection

Which of the below statements is NOT true of frameshift mutations?

• They often happen when one or more nucleotides are inserted or deleted from DNA

• They can result in the production of non-functional proteins

• They apply to the reading frame (sequence of codons) being changed

• They result from a base substitution

Analogous structures serve the same function, are similarly constructed, and are inherited from a common ancestor. (True/False)

• True

• False

A population must have _____ for natural selection to occur.

• Many individuals

• Stable environment

• Abundant resources

• Heritable variation

Snakes still retain underdeveloped structures such as pelvic girdles and the left lung. What describes these structures?

• Vestigial structures

• Mutations

• Analogous structures

• Homologous structures

DNA replication is considered semiconservative because…

• It always replicates in the 3' to 5' direction

• It uses one old strand as a template for the synthesis of a new strand

• It never replicates in the 5' to 3' direction

• It will create three new identical strands when finished

A form of gene regulation that occurs while RNA is still in the nucleus is…

• Differential intron removal and exon splicing

• Enzymatic cleavage of a polypeptide

• Feedback control

• Rate of binding to ribosomes

Which of the following statements do NOT describe Gregor Mendel?

• He had a strong background in mathematics

• He kept very detailed records of his research

• He neglected to collect quantitative data from his experiments

• He followed the scientific method closely while doing his research

Which misconceptions about evolution can be refuted with the molecular evidence collected through DNA analysis?

• Evolution proposes life changed as a result of random events

• Evolution is not observable or testable

• There are no transitional fossils

• Evolution is a theory about how life originated

If a pea plant shows a recessive phenotype, what is the possible genotype?

• The genotype can only be TT

• The genotype may be TT, Tt, or tt

• The genotype may be TT or Tt

• The genotype can only be tt