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Genetics Review
Test Description: Answer these questions about genetics
Instructions: Answer all questions to get your test result.
1) The presence of DNA is important for cellular metabolic activities because DNA
A
is the major component of cytoplasm
B
directs the production of enzymes
C
is a structural component of cell walls
D
directly increases the solubility of nutrients
2) In squirrels, the gene for gray fur (G) is dominant over the gene for black fur (g). If 50% of a large litter of squirrels are gray, the parental cross that produced this litter wa
A
gg x gg
B
Gg x gg
C
GG x GG
D
GG x Gg
3) Which cross could produce a child with type O blood?
A
AB x OO
B
AO x BO
C
AO x BB
D
AA x BO
4) Which represents the genotype of a homozygous condition?
A
rr
B
PQ
C
Fg
D
Rr
5) Geneticists have observed that fruit flies that commonly inherit vestigial wings also inherit lobed eyes. Observations such as this have helped to develop the genetic concept known
A
dominance
B
gene linkage
C
segregation
D
crossing over
6) Chromosomes normally occur as homologous pairs in
A
a gamete
B
a sperm cell
C
an egg cell
D
a zygote
7) Because the gene for hemophilia is located on the X-chromosome, it is normally impossible for a
A
carrier mother to pass the gene to her daughter
B
carrier mother to pass the gene to her son
C
hemophiliac father to pass the gene to his daughter
D
hemophiliac father to pass the gene on to his son
8) A man with a blood genotype AO marries a woman with a blood genotype of AO. What blood types could be expected in their children?
A
type A
B
both type A and type O
C
neither A or O
D
type O
9) The outward appearance (gene expression) of a particular trait in an organism is referred to as
A
a phenotype
B
a chromosome
C
an allele
D
a genotype
10) When many hybrid tall pea plants are cross-pollinated, the offspring produced will probably be
A
100% heterozygous tall
B
100% homozygous tall
C
50% homozygous tall
D
50% heterozygous tall
*select an answer for all questions
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