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7th Grade Ch 5 Lessons 2 And 3.1
Test Description: Genetics
Instructions: Answer all questions to get your test result.
1) What do the squares on a pedigree represent?
A
male
B
has the trait
C
carriers
D
female
2) When the offspring's phenotype is a combination (mixing) of the parents' phenotypes, it is known as
A
dominance
B
incomplete dominance
C
recessive
D
codominance
3) When both alleles can be observed in a phenotype (like spots), it is called
A
codominance
B
dominance
C
recessive
D
incomplete dominance
4) Phenotypes are only affected by genes.
A
false
B
true
5) When multiple genes determine the phenotype of a trait, it is called
A
incomplete dominance
B
codominance
C
multiple alleles
D
polygenic inheritance
6) Erwin Chargaff discovered
A
the shape of DNA
B
that DNA existed
C
that pea plants have DNA
D
chemical information about DNA
7) An organism's genetic material is called
A
DNA
B
tRNA
C
rRNA
D
mRNA
8) A molecule made of a nitrogen base, a sugar, and a phosphate group
A
nucleotide
B
chromosome
C
double helix
D
monomer
9) The shape of DNA
A
triple helix
B
spiral square
C
double helix
D
single helix
10) Who used X-Rays to study the shape of DNA?
A
Chargaff
B
Franklin and WIlkins
C
Mendel
D
Watson and Crick
11) Who build a model of DNA
A
Watson and Crick
B
Mendel
C
Chargaff
D
Franklin and Wilkins
12) What do the squares on a pedigree represent?
A
female
B
carriers
C
male
D
has the trait
13) EE is
A
heterozygous
B
homozygous
14) If the two alleles of a gene are different, its genotype is
A
hematozygous
B
heterozygous
C
homozygous
D
holozygous
15) R is round and r is wrinkled. What is the genotype of Rr?
A
Rr
B
round
C
RR
D
wrinkled
16) R is round and r is wrinkled. What is the phenotype of Rr?
A
wrinkled
B
Rr
C
RR
D
round
17) The different forms of a gene are called
A
peas
B
alleles
C
chromosomes
D
traits
18) A section on a chromosome that has genetic information for one trait is called a
A
gene
B
genotype
C
allele
D
phenotype
19) What contains genetic information that controls traits?
A
spindles
B
ribosomes
C
chromosomes
D
centrioles
20) How a trait appears, or is expressed, is the trait's
A
phenotype
B
genotype
C
expressotype
D
appearotype
*select an answer for all questions
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