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Mid Term Exam Review
Test Description: Review for mid term exam
Instructions: Answer all questions to get your test result.
1) What theory proposes that species envolve during short periods of rapid change?
A
punctuated equilibria
B
gradualism
C
absolute dating
D
evolution
2) What are multiple alleles?
A
three or more forms of a gene that code for a single trait
B
more than two codominant alleles in the parents
C
three or more chromosomes that determind a trait
D
more than two genes that control a trait
3) What evidence is most important when using relative dating?
A
the types of minerals in a petrified fossil
B
the positions of fossils in sedimentary rock layers
C
the position of sediment in petrified rock
D
the half-life of a radioactive element
4) How do scientists determind the actual age of fossils?
A
mold and cast dating
B
relative dating
C
absolute dating
D
sedimentary dating
5) What is the role of genes in evolution?
A
Only genes can be acted in by natural selection
B
the genes of most surviving parents have only dominant alleles
C
parents with recessive genes die from overproduction
D
only traits that are controlled by genes can be acted on by natural selection
6) Walter Sutton discovered that the sex cells of grasshoppers havr exactly
A
twice the number of chromosomes found in the body cells
B
12 times the number of chromosomes found in the boddy cells
C
the same number of chromosomes found in the body cells
D
half the number of chromosomes found in the body cells
7) Sex-linked genes are genes on
A
the X and Y chromosomes
B
the Y chromosomes only
C
the X chromosomes only
D
all 23 pairs of chromosomes
8) What is a mutation?
A
any change that is helpful to an organism
B
any change in a gene or a chromosome
C
any changes that is harmful to an organism
D
any change in the phenotype of a cell
9) When sex cells combine to produce offspring, each sex cell eith contributre
A
twice the number af normal chromosomes
B
half the normal number of chromosomes
C
one fourth of the normal number of chromosomes
D
the normal number of chromosomes
10) Which term refers to similar structures that relate species have inherited from a common ancestor?
A
DNA sequence
B
developedmental organisms
*select an answer for all questions
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