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Bio I- Genetics REVIEW, 3/13
Test Description: Use this to study for your unit test!
Instructions: Answer all questions to get your test result.
1) If a pea plant has a recessive allele for green peas, it's phenotype will be ______..
A
green if it also has a dominant allele for yellow peas
B
green if it does not have a dominant allele for yellow peas
C
green and yellow if it has a dominant allele for yellow peas.
D
yellow if it does not also have a dominant allele for green peas
2) If a pea plant's alleles for height are tt, what is true of its parents?
A
both parents contributed a dominant allele
B
both parents were short
C
both parents were tall
D
both parents contributed a recessive allele
3) In the cross between a heterozygous male and a homozygous dominant female, which of the following is true about the resulting offspring, assuming complete dominance is involved?
A
All will demonstrate the dominant trait
B
about 3/4 will be heterozygous
C
all will be homozygous recessive
D
about half will be homozygous recessive
4) How many *different* allele combinations would be found in the gametes produced by a pea plant whose genotype was RrYY?
A
2
B
16
C
8
D
4
5) When one allele is not completely dominant over another, this is an example of ___.
A
sex-linked traits
B
codominance
C
multiple alleles
D
incomplete dominance
6) Which of the following shows that environment can affect genetic traits?
A
Hydrangea flower color varies with soil pH
B
Oak trees get taller as they grow
C
Dandelion plants are self-pollinating
D
Pinion trees bear cones every other year
7) Chromosomes form tetrads during ____.
A
Prophase I of meiosis
B
Anaphase II of meiosis
C
Metaphase I of meiosis
D
Interphase
8) What is formed at the end of meiosis?
A
four genetically identical cells
B
two genetically different cells
C
two genetically identical cells
D
four genetically different cells
9) Gametes have ___.
A
Half the number of chromosomes found in body cells
B
twice the number of chromosomes found in body cells
C
two sets of chromosomes
D
homogolous chromosomes
10) A cross between a black chicken and a white chicken produces all speckled offspring. This type of inheritance is known as ___.
A
codominance
B
incomplete dominance
C
sex-link traits
D
complete dominance
11) All the genes, including all the different alleles for each gene, that are present in a population at any one time
A
Stabilizing Selection
B
Genetic Drift
C
Gene Pool
D
Disruptive Selection
12) Form of natural selection in which individual near the center of a distribution curve have higher fitness than individuals at the other end of the curve.
A
Genetic Drift
B
Gene Pool
C
Disruptive Selection
D
Stabilizing Selection
13) Form of natural selection in which individuals at the upper and lower ends of the curve have higher fitness that individuals near the middle of the curve
A
Gene Pool
B
Stabilizing Selection
C
Genetic Drift
D
Disruptive Selection
14) Random change in allele frequency caused by a series of chance occurences that cause an allele to become more or less popular in population
A
Disruptive Selection
B
Genetic Drift
C
Gene Pool
D
Stabilizing Selection
15) Situation in which allele frequencies in a population remain the same
A
Gene Pool
B
Bottleneck Effect
C
Genetic Equillibrium
D
Genetic Drift
16) A change in allele frequency following a dramatic reduction in the size of a population
A
Genetic Drift
B
Stabilizing Selection
C
Bottleneck Effect
D
Gene Pool
*select an answer for all questions
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