Question

HELP PLEASE!!!!!!!! (Part 1)

1) A __________ is a physical trait one can see, while a __________ is the section of DNA associated with a certain trait that causes it to appear.

a) allele, gene trait

b) phenotype, genotype

c) DNA, inherited trait

d) genotype, phenotype



2) DNA and histone proteins are the fundamental parts of a ___________.

a) chromosome

b) cytosome

c) isotosome

d) lysosome



3) What does heredity mean?

a) the process of DNA replicating into two strands

b) DNA make RNA, and RNA makes proteins

c) a human genetic disorder

d) traits passed down from parent and grandparents to offspring



4) What are agents like radiation or chemical substances that can alter or break the

1) DNA molecule that makes up a chromosome?

a) metamorphosis

b) mutations

c) mutagens

d) modification



5) What type of mutation is caused when a codon that corresponds to one of the twenty amino acids specified by the genetic code is changed to a chain-terminating codon?

a) silent mutation

b) chromosomal mutation

c) nonsense mutation

d) missense mutation

Answer 1

1. b) phenotype, genotype

2. a) chromosome

3. d) traits passed down from parent and grandparents to offspring

4. c) mutagens

5. c) nonsense mutation