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