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Genetics And Heredity
Test Description: Genetics and Heredity
Instructions: Answer all questions to get your test result.
1) The genotype of an individual with one dominant and one recessive allele.
A
helozygous
B
homozygous
C
homyzygous
D
heterozygous
2) T=tall, t=short What is the genotype of a short plant?
A
TT
B
Tt
C
all of the options are correct
D
tt
3) In pea plants, color is a simple dominant/recessive condition (C= green, c= yellow). If 2 heterozygous green plants are crossed, what is the probability of producing green offspring?
A
75%
B
50%
C
25%
D
100%
4) C=green, c= yellow What is the phenotype of a yellow pea plant?
A
cc
B
Cc
C
yellow color
D
CC
5) Which structure contains many genes?
A
proteins
B
nucleotides
C
chromosomes
D
alleles
6) The scientific term for children.
A
dominance
B
phenotype
C
zygote
D
offspring
7) In a certain plant, red is incompletely dominant over white. What genotype would describe a pink plant?
A
all of the options
B
heterozygous
C
homozygous dominant
D
homozygous recessive
8) In your garden, you have some red flowers and some yellow flowers. You decide to cross a pure-breeding red flower with a pure-breeding yellow flower, and it results in all orange flowers.
A
incomplete dominance
B
X-linked
C
simple dominant-recessive
D
codominant
9) A father has homozygous B blood genotype. What is the possible genotype of the mother if their child has type AB blood?
A
Bot IAIA and IAi are possible.
B
IAIA
C
IAi
D
ii
10) Human ABO blood type is an example of what type of mode of inheritance?
A
codominance
B
incomplete dominance
C
X-linked
D
simple dominant-recessive
11) Make a cross between an individual who is heterozygous for type A blood and an individual who is heterozygous for type B blood. What are the phenotypic ratios for this couple’s children?
A
25% type O, 25% type A, 25% type B, 25% type AB
B
50% type AB, 50% type A
C
50% type B, 50% type A
D
50% type AB, 25% type O, 25%, type B, 50% type A
12) Suppose a couple has 10 children (5 girls and 5 boys). Neither couple has the genetic disorder, but of their all 5 of their boys do. What mode of inheritance is likely for this disorder?
A
incomplete dominance
B
codominance
C
X-linked
D
polygenic
13) Suppose a black male kitten and a white female kitten reproduce and some of their offspring are black, white, and black-white spotted. What mode of inheritance is most likely for fur color in the cats?
A
X-linked
B
simple dominant-recessive
C
incomplete dominance
D
codominance
14) In a certain flower, Red is dominance, yellow is recessive, and a heterozygous flower is red/yellow striped. What would be the phenotypes of a red flower crossed with a yellow flower?
A
50% yellow, 50% red
B
100% striped
C
25% red, 50% striped, 25% yellow
D
50% red, 50% striped
15) A chart that shows all the possible combinations of alleles that can result from a genetic cross is called a
A
Purebred cross
B
Pascal triangle
C
Punnett square
D
Hybrid cross
16) Heredity is
A
the genetic material that carries information about an organism.
B
the scientific study of genetics.
C
the passing of traits from parent to offspring through DNA
D
an organism's genetic make-up of allele frequency.
17) A change in the DNA sequence of a gene that alters the gene and protein.
A
allele frequency
B
genetic malformation
C
genetic mutation
D
beneficial allele
18) If the genome of a person consists of more or fewer than 46 chromosomes, the person has a genetic disorder resulting from
A
nondisjunction of chromosomes.
B
beneficial mutations.
C
benign mutations.
D
chromosome translocation.
19) Which situation would most likely produce a gene mutation in a squirrel?
A
The weather becomes wetter for a short period of time
B
The squirrel is exposed to X-Ray radiation for several days
C
Oak trees gradually become less common
D
The squirrel stops using its claws for digging
20) Color blindness is an X-linked recessive disorder. If a normal vision man and a carrier women have children, which of the following describe their offspring?
A
100% of their boys and none of their girls are predicted to be colorblind.
B
50% of their children are predicted to be colorblind.
C
50% of their boys and none of their girls are predicted to be colorblind.
D
50% of their boys and 100% of their girls are predicted to be colorblind.
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