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BioSemExam Part 2
Test Description: Semester test
Instructions: Answer all questions to get your test result.
1) Sister chromatids separate and move to opposite poles in the cell
A
metaphase
B
telophase
C
anaphase
D
prophase
2) Which list shows the phases of mitosis in the correct order?
A
prophase, metaphase, anaphase, telophase
B
anaphase, metaphase, prophase, telophase
C
prophase, anaphase, metaphase, telophase
D
metaphase, prophase, telophase, anaphase
3) Which statement correctly describes the number of chromosomes in body cells and gametes?
A
body cells and gametes are both diploid
B
body cells are haploid and gametes are diploid
C
body cells and gametes are both haploid
D
body cells are diploid and gametes are haploid
4) Produces four daughter cells with the haploid number of chromosomes
A
cytokinesis
B
meiosis
C
interphase
D
mitosis
5) Why is it important that the number of chromosomes be reduced during meiosis?
A
The chromosome number will stay constant from one generation to the next
B
The cell can grow without the DNA content increasing
C
The nucleus of the cell will not be allowed to become larger due to cell growth
D
The amount of DNA in the cell can remain at its lowest number
6) Which statement correctly describes the genetic makeup of the sperm cells produced by a human male?
A
Each cell has half the normal number of chromosomes and the cells are usually genetically different
B
Each cell has double the amount of chromosomes and the cells are usually genetically different
C
Each cell has half the normal number of chromosomes and the cells are usually genetically identical
D
Each cell has a complete pair of chromosomes and the cells are usually genetically identical
7) The specialized cells that result from meiosis are
A
Gametes
B
Autosomes
C
Body Cells
D
Cancer Cells
8) The diploid number of chromosomes in a human skin cell is 46. How many chromosomes are in a human egg cell?
A
12.5 chromosomes
B
23 chromosomes
C
46 chromosomes
D
92 chromosomes
9) Which term describes the failure of homologous chromosomes to segregate properly during meiosis?
A
recombination
B
nondisjunction
C
independent assortment
D
polyploidy
10) Who is the father of genetics?
A
Watson and Crick
B
Gregor Mendel
C
Robert Hooke
D
Erwin Chargaff
11) When Mendel crossed tall heterozygous plants, what results did he observe in the next generation?
A
75% tall plants and 25% short plants
B
50% tall plants and 50% short plants
C
100% medium plants
D
100% tall plants
12) The law of segregation explains that
A
different alleles of a gene can never be found in the same organism
B
each gene is found on a different molecule of DNA
C
each gene of an organism ends up in the same gamete
D
alleles of a gene separate from each other during meiosis
13) Which of Gregor Mendel's discoveries is represented when a black dog and a white dog mate, and all the resulting puppies are black?
A
segregation
B
sex linkage
C
independent assortment
D
dominance
14) Roan horses have alleles for both red and white hair and display both traits (meaning their coat is a speckled mixture of red hairs and white hairs). This is an example of:
A
Incomplete dominance
B
Codominance
C
Recessive dominance
D
Complete dominance
15) In four o'clock flowers, the alleles for red and white flowers show incomplete dominance. Heterozygous four o'clock plants have
A
half pink flowers and half red flowers
B
red flowers
C
pink flowers
D
white flowers
16) Snapdragons with white and red flowers show incomplete dominance when they produce offspring. If a white snapdragon is crossed with a pink snapdragon, what are the possible phenotypes?
A
2 pink. 2 red
B
2 white, 2 pink
C
1 pink, 2 red, 1 white
D
2 red, 2 white
17) Which is an advantage of crossing over during meiosis?
A
it keeps maternal and paternal chromosomes intact
B
it allows dominant genes to be expressed more often
C
it decreases genetic variations
D
it increases genetic variations
18) Which mode of inheritance explains why a mother with a particular recessive tract will always pass it on to her son?
A
incomplete dominance
B
multiple alleles
C
codominance
D
sex-linkage
19) Which is the karyotype for the twenty-third pair of chromosomes of a normal human female?
A
XXY
B
XY
C
XXO
D
XX
20) The phenotypes of the pea plants resulting from this cross could be described as-
A
Half tall, half short
B
All tall
C
One-quarter tall, three-quarters short
D
Three-quarters tall, one-quarter short
*select an answer for all questions
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