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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
heterozygous
B
homozygous
C
helozygous
D
homyzygous
2) T=tall, t=short What is the genotype of a short plant?
A
tt
B
all of the options are correct
C
Tt
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
25%
B
100%
C
75%
D
50%
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
nucleotides
B
chromosomes
C
alleles
D
proteins
6) The scientific term for children.
A
zygote
B
offspring
C
phenotype
D
dominance
7) In a certain plant, red is incompletely dominant over white. What genotype would describe a pink plant?
A
homozygous dominant
B
homozygous recessive
C
heterozygous
D
all of the options
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
simple dominant-recessive
B
codominant
C
X-linked
D
incomplete dominance
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
IAi
C
IAIA
D
ii
10) Human ABO blood type is an example of what type of mode of inheritance?
A
X-linked
B
codominance
C
simple dominant-recessive
D
incomplete dominance
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
50% type AB, 25% type O, 25%, type B, 50% type A
B
25% type O, 25% type A, 25% type B, 25% type AB
C
50% type B, 50% type A
D
50% type AB, 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
codominance
B
incomplete dominance
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
incomplete dominance
C
codominance
D
simple dominant-recessive
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% red, 50% striped
B
50% yellow, 50% red
C
25% red, 50% striped, 25% yellow
D
100% striped
15) A chart that shows all the possible combinations of alleles that can result from a genetic cross is called a
A
Punnett square
B
Hybrid cross
C
Purebred cross
D
Pascal triangle
16) Heredity is
A
the scientific study of genetics.
B
the genetic material that carries information about an organism.
C
an organism's genetic make-up of allele frequency.
D
the passing of traits from parent to offspring through DNA
17) A change in the DNA sequence of a gene that alters the gene and protein.
A
genetic mutation
B
allele frequency
C
beneficial allele
D
genetic malformation
18) If the genome of a person consists of more or fewer than 46 chromosomes, the person has a genetic disorder resulting from
A
beneficial mutations.
B
benign mutations.
C
nondisjunction of chromosomes.
D
chromosome translocation.
19) Which situation would most likely produce a gene mutation in a squirrel?
A
The squirrel is exposed to X-Ray radiation for several days
B
Oak trees gradually become less common
C
The squirrel stops using its claws for digging
D
The weather becomes wetter for a short period of time
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
50% of their children are predicted to be colorblind.
B
50% of their boys and 100% of their girls are predicted to be colorblind.
C
50% of their boys and none of their girls are predicted to be colorblind.
D
100% of their boys and none of their girls are predicted to be colorblind.
*select an answer for all questions
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