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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
prophase
B
metaphase
C
anaphase
D
telophase
2) Which list shows the phases of mitosis in the correct order?
A
anaphase, metaphase, prophase, telophase
B
prophase, anaphase, metaphase, telophase
C
prophase, metaphase, anaphase, telophase
D
metaphase, prophase, telophase, anaphase
3) Which statement correctly describes the number of chromosomes in body cells and gametes?
A
body cells are haploid and gametes are diploid
B
body cells are diploid and gametes are haploid
C
body cells and gametes are both diploid
D
body cells and gametes are both haploid
4) Produces four daughter cells with the haploid number of chromosomes
A
meiosis
B
mitosis
C
cytokinesis
D
interphase
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 amount of DNA in the cell can remain at its lowest number
C
The nucleus of the cell will not be allowed to become larger due to cell growth
D
The cell can grow without the DNA content increasing
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 identical
B
Each cell has half the normal number of chromosomes and the cells are usually genetically different
C
Each cell has double the amount of chromosomes and the cells are usually genetically different
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
Body Cells
B
Gametes
C
Cancer Cells
D
Autosomes
8) The diploid number of chromosomes in a human skin cell is 46. How many chromosomes are in a human egg cell?
A
23 chromosomes
B
46 chromosomes
C
92 chromosomes
D
12.5 chromosomes
9) Which term describes the failure of homologous chromosomes to segregate properly during meiosis?
A
nondisjunction
B
polyploidy
C
independent assortment
D
recombination
10) Who is the father of genetics?
A
Erwin Chargaff
B
Watson and Crick
C
Robert Hooke
D
Gregor Mendel
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
100% medium plants
C
100% tall plants
D
50% tall plants and 50% short plants
12) The law of segregation explains that
A
alleles of a gene separate from each other during meiosis
B
each gene is found on a different molecule of DNA
C
each gene of an organism ends up in the same gamete
D
different alleles of a gene can never be found in the same organism
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
dominance
C
sex linkage
D
independent assortment
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
Recessive dominance
B
Incomplete dominance
C
Complete dominance
D
Codominance
15) In four o'clock flowers, the alleles for red and white flowers show incomplete dominance. Heterozygous four o'clock plants have
A
pink flowers
B
white flowers
C
red flowers
D
half pink flowers and half red 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
1 pink, 2 red, 1 white
B
2 red, 2 white
C
2 white, 2 pink
D
2 pink. 2 red
17) Which is an advantage of crossing over during meiosis?
A
it decreases genetic variations
B
it keeps maternal and paternal chromosomes intact
C
it allows dominant genes to be expressed more often
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
sex-linkage
B
codominance
C
multiple alleles
D
incomplete dominance
19) Which is the karyotype for the twenty-third pair of chromosomes of a normal human female?
A
XX
B
XXY
C
XY
D
XXO
20) The phenotypes of the pea plants resulting from this cross could be described as-
A
One-quarter tall, three-quarters short
B
All tall
C
Three-quarters tall, one-quarter short
D
Half tall, half short
*select an answer for all questions
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