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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
pistil
C
stamen
D
stigma
2) How did Mendel keep his pea plants from self-pollinating?
A
he covered the pistil with a tiny glass container.
B
he cut off the pistils of some flowers.
C
he cut off all the flowers on one plant.
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% short, 25% tall
B
50% tall, 50% short
C
75% tall, 25% short
D
100% tall, 0% short
4) How do recessive traits show up?
A
if the organism has at least 1 recessive allele.
B
if the organism inherits 2 recessive alleles
C
if the organism has no recessive alleles
D
if the organism has 1 dominant and 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
Darwin chart
B
Mendel square
C
Punnett square
D
Sutton square
7) Which genotype is homozygous?
A
tt
B
TT and tt
C
TT
D
Tt
8) Female sex cells are called
A
stamen
B
pistils
C
sperm
D
eggs
9) Half of an organism's alleles come from mom and half from dad.
A
false
B
true
10) Human body cells have
A
23 chromosomes
B
24 chromosomes
C
46 chromosomes
D
46 pairs of chromosomes
11) When sex cells join together in the process of fertilization,
A
the fertilized egg has 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 half the original number of chromosomes.
12) In the first division of meiosis,
A
4 daughter cells are created
B
chromosomes are not in the cell
C
chromosome pairs are split at the centromere
D
chromosome pairs separate and move to opposoite ends of the cell.
13) Genes are carried from parents to offspring on structures called
A
chromosomes
B
alleles
C
phenotypes
D
genotypes
14) Which of the following desribes a pattern of inheritance in which one allele is only partially dominant?
A
multiple alleles
B
codominance
C
acquired traits
D
incomplete dominance
15) Which of the following is an acquired trait?
A
all of the above
B
flower color
C
height
D
language
16) Which of the following is a heterozygous genotype?
A
YNOT?
B
yy
C
Yy
D
YY
17) A ___ offspring is the offspring of many generations that have the same form of a trait.
A
purebred
B
genotype
C
heterozygous
D
hybrid
18) The result of a coin toss will affect the result of the next coin toss.
A
true
B
false
19) An organism's __ is its genetic makeup.
A
phenotype
B
genotype
C
homozygous
D
heterozygous
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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