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8th Grade Science Test Review

25 Questions  I  By Monicada
This is a practice test designed to help you with your test on Tuesday.

  
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Question Excerpt

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1.  Identify the following: rr
A.
B.
C.
D.
2.  Scientist which contributed to the discovery of the DNA structure were: James Watson, Francis Crick, and Rosalind Franklin.
A.
B.
3.  The passing of traits from parents to offspring.
A.
B.
C.
D.
4.  An organism’s appearance is known as its
5.  GG = gray hair Gg = gray hair gg = white hair BB = black eyes Bb = black eyes bb = red eyes  A male rabbit with the genotype GGbb is crossed with a female rabbit with the genotype ggBb Question: How many out of 16 have white fur and black eyes? ________
6.  A nucleotide is composed of
A.
B.
C.
D.
7.  In rabbits, grey hair is dominant to white hair.  Also in rabbits, black eyes are dominant to red eyes. These letters represent the genotypes of the rabbits: GG = gray hair Gg = gray hair gg = white hair BB = black eyes Bb = black eyes bb = red eyes  A male rabbit with the genotype GGbb is crossed with a female rabbit with the genotype ggBb The square is set up below. Fill it out and determine the phenotypes and proportions in the offspring. Question: How many out of 16 have grey fur and black eyes? ________
8.  A cross of two traits.
A.
B.
C.
9.  A genetic disorder caused from an added chromosome to chromosome 21.
A.
B.
C.
10.  The instructions for an inherited trait.
A.
B.
C.
D.
11.  The genetic material that determines inherited characteristics.
A.
B.
C.
D.
12.  Identify the  following: Dd
A.
B.
C.
D.
13.  The outer boundary of the cell designed to regulate what comes and out of the cell.
A.
B.
C.
14.  Different forms of a characteristic.
15.  An organelle enclosed in a membrane that contains DNA.
A.
B.
C.
D.
16.  A trait or allele expressed only when two recessive alleles for the same characteristic are inherited.
17.  Used to organize all the possible genotype combinations of offspring from particular parents.
A.
B.
C.
18.  The different forms of a gene.
A.
B.
C.
D.
19.  A homozygous round seeded plant is crossed with a homozygous wrinkled seeded plant. What are the genotypes of the parents? R= Round r=wrinkled
20.  DNA is made of subunits called
21.  Erwin Chargaff's base pairing rule state that ___________ has an equal proportion to ___________, and ____________ to _____________.
A.
B.
C.
22.  This is an image of a _________________.
A.
B.
C.
D.
23.  Rr x rr R= Round r= wrinkled What percentage of the offspring will be round? ___________
A.
B.
C.
D.
24.  The combination of inherited alleles together form an organism’s .
25.  A feature that has different forms in a population.
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