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