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Genetics Test Review
Test Description: Test Review
Instructions: Answer all questions to get your test result.
1) Different forms of a gene are called...
A
Homozygous
B
Dominant
C
Recessive
D
Alleles
2) When two different alleles are present, the allele that is fully expressed is...
A
Phenotype
B
Dominant
C
Genotype
D
Alleles
3) When two different alleles are present, the allele that has no observable effect on the organism
A
Homozygous
B
Alleles
C
Dominant
D
Recessive
4) The set of alleles an organism has is its...
A
Phenotype
B
Genotype
C
Heterozygous
D
Homozygous
5) An organism's physical appearance.
A
Homozygous
B
Genotype
C
Phenotype
D
Alleles
6) When two alleles from a particular gene are different
A
Heterozygous
B
Phenotype
C
Genotype
D
Homozygous
7) When two alleles from a particular gene are the same
A
Heterozygous
B
Genotype
C
Phenotype
D
Homozygous
8) A diagram that predicts the outcomes of a genetic cross
A
Probability
B
Genetic Disorder
C
Punnett Square
D
Pedigree
9) An inherited disease or condition
A
Punnett Square
B
Genetic Disorder
C
Probability
D
Pedigree
10) the likelihood that a specific event will occur.
A
Punnett Square
B
Probability
C
Pedigree
D
Genetic Disorder
11) A family history that shows how a trait is inherited.
A
Genetic Disorder
B
Punnett Square
C
Pedigree
D
Probability
12) A plant with YY alleles for seed color is...
A
homozygous recessive for this character
B
homozygous dominant for this character
C
Either a or b
D
heterozygous dominant for this character
13) The garden pea plant is a good subject for genetic study because it...
A
has characters in two clearly different forms
B
all of the above
C
produces many offspring
D
is easy to grow
14) Which of the following is a genotype for an individual heterozygous for a trait.
A
Pr
B
tt
C
both a and c
D
Rr
15) In a pedigree, two normal parents produce a child with a genetic disorder. Based on this information, we know the disorder is caused by...
A
recessive allele
B
codominant allele
C
sex-linked allele
D
dominant allele
16) Purple (P) is a dominant allele, while white (p) is recessive. The results of a testcross are some purple plants and some white plants. What is the genotype of the original purple pea plant?
A
PP
B
pp
C
not enough information
D
Pp
17) Which of the following is not true of most sex-linked traits?
A
usually seen in males
B
located on chromosomes that are not related to sex
C
located on the X chromosome
D
usually recessive
18) When several genes influence a character, the character is said to be...
A
codominant
B
polygenic
C
completely dominant
D
incompletely dominant
19) Which of the following patterns of heredity can result in an intermediate trait, such as pink flowers produced from a white parent and a red parent
A
multiple alleles
B
incomplete dominance
C
sex-linked alleles
D
codominance
20) Which of the following is responsible or the seasonal fur color of arctic foxes, which depends on the temperature?
A
codominance
B
environmental factors
C
incomplete dominance1
D
multiple alleles
*select an answer for all questions
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