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Chapter 11 -Intro To Genetics
Test Description: The work of Gregor Mendel and the basics of genetics.
Instructions: Answer all questions to get your test result.
1) Different forms of a gene are called
A
recessive factors
B
dominant factors
C
alleles
D
hybrids
2) If a homozygous tall pea plant and a homozygous short pea plant are crossed,
A
the offspring are of medium height
B
no hybrids are produced
C
the recessive trait seems to disappear
D
all offspring are short
3) A Punnett square is used to determine the
A
probable outcome of a cross
B
results of meiosis
C
results of mitosis
D
actual outcome of a cross
4) Organisms that have two identical alleles for a particular trait are said to be
A
heterozygous
B
homozygous
C
dominant
D
hybrid
5) The physical characteristics of an organism are its
A
genotype
B
genetics
C
phenotype
D
heredity
6) Meiosis takes _______ set(s) of chromosomes and puts ______ set(s) in each gamete.
A
1, 1
B
1, 2
C
2, 1
D
2, 2
7) What stage of meiosis has homologous pairs of chromosomes lined up on the cells equator?
A
metaphase II
B
telophase I
C
prophase I
D
metaphase I
8) Unlike mitosis, meiosis in male mammals results in formation of
A
three diploid polar bodies
B
four diploid gamete cells
C
one haploid cell
D
four haploid gamete cells
9) To maintain the chromosome number of an organism, the gametes must
A
become recessive
B
be produced by mitosis
C
be produced by meiosis
D
become diploid
10) Crossing over
A
occurs during mitosis
B
involves the exchange of chromosomal material from non-homologous chromosomes
C
involves the exchange of chromosomal material from homologous chromosomes
D
means you made it to the other side
*select an answer for all questions
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