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Genetics
Test Description: 7th grade
Instructions: Answer all questions to get your test result.
1) The male part of the flower is the
A
ovule
B
stamen
C
pistil
D
stigma
2) How did Mendel keep his pea plants from self-pollinating?
A
he cut off all the flowers on one plant.
B
he covered the pistil with a tiny glass container.
C
he cut off the pistils of some flowers.
D
he cut off the stamens of some flowers.
3) What were the offspring like in the F2 generation (when Mendel let the F1 generation self pollinate)?
A
75% tall, 25% short
B
100% tall, 0% short
C
75% short, 25% tall
D
50% tall, 50% short
4) How do recessive traits show up?
A
if the organism has no recessive alleles
B
if the organism inherits 2 recessive alleles
C
if the organism has 1 dominant and 1 recessive allele
D
if the organism has at least 1 recessive allele.
5) Which of the following is considered a hybrid?
A
TT
B
tt
C
Tt
6) A chart that shows all the possible ways alleles can combine in a genetic cross is called a
A
Punnett square
B
Darwin chart
C
Mendel square
D
Sutton square
7) Which genotype is homozygous?
A
TT
B
Tt
C
tt
D
TT and tt
8) Female sex cells are called
A
eggs
B
pistils
C
stamen
D
sperm
9) Half of an organism's alleles come from mom and half from dad.
A
true
B
false
10) Human body cells have
A
46 pairs of chromosomes
B
24 chromosomes
C
23 chromosomes
D
46 chromosomes
11) When sex cells join together in the process of fertilization,
A
the fertilized egg has half the original number of chromosomes.
B
the fertilized egg has a random amount of chromosomes.
C
the fertilized egg has twice the original number of chromosomes
D
the fertilized egg has the original number of chromosomes.
12) In the first division of meiosis,
A
chromosomes are not in the cell
B
chromosome pairs separate and move to opposoite ends of the cell.
C
4 daughter cells are created
D
chromosome pairs are split at the centromere
13) Genes are carried from parents to offspring on structures called
A
genotypes
B
phenotypes
C
chromosomes
D
alleles
14) Which of the following desribes a pattern of inheritance in which one allele is only partially dominant?
A
codominance
B
acquired traits
C
incomplete dominance
D
multiple alleles
15) Which of the following is an acquired trait?
A
language
B
all of the above
C
flower color
D
height
16) Which of the following is a heterozygous genotype?
A
YY
B
YNOT?
C
yy
D
Yy
17) A ___ offspring is the offspring of many generations that have the same form of a trait.
A
genotype
B
hybrid
C
purebred
D
heterozygous
18) The result of a coin toss will affect the result of the next coin toss.
A
false
B
true
19) An organism's __ is its genetic makeup.
A
genotype
B
heterozygous
C
homozygous
D
phenotype
20) Genetic changes can happen by
A
pollutants can affect genes.
B
random chance
C
tobacco smoke affecting genees
D
all of the above
*select an answer for all questions
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