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Unit 4 -- Genetics Flashcards | StudBud
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Unit 4 -- Genetics
Unit 4 -- Genetics
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Your guide to a great grade in genetics.
Flashcards
35 cards
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Practice quiz
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Questions
35
Answers
1
When a purebred dominant is crossed with a purebred recessive, what % of offspring show recessive trait?
50%
75%
25%
0%
2
When hybrids are crossed, what percentage of offspring will show the recessive trait?
25%
50%
0%
75%
3
Proteins are made up of ...
amino acids
DNA
alleles
ribosomes
4
An organism that has two different alleles for a trait is a(n)
hybrid
diverse
dihybrid
codominant
5
A mistake along a DNA strand causes.....
an error
an allele
an 8th grade boy
a mutation
6
Two different alleles for a trait causes an organism to be ... for that trait.
recessive
hybrid
heterozygous
homozygous
7
The mathematical study of the possibilty that a particular trait may show up is called ...
probability
percentage
genetics
heredity
8
Amino acids are added to a protein chain by reading a ....-letter code.
2
4
3
1
9
What does tt mean to geneticists?
two dominant alleles
two recessive alleles
heterozygous for a trait
tiny tim
10
Where is tRNA found?
in the nucleus
in a protein
in the ribosome
in the cytoplasm
11
DNA holds the instructions for ..
mRNA
RNA replication
tRNA
protein synthesis
12
Where does mRNA start it transcription of a gene?
ribosome
nucleus
cytoplasm
amino acid
13
A purebred organism has...
the same alleles for a trait
three alleles for a trait
has all the same alleles as the parents
looks the same as its parents
14
When a trait has two different alleles that are neither dominant nor recessive, they are said to be....
corecessive
codominant
recessive
dominant
15
RR, is the ... of an organism.
heterozygous
dominant
genotype
recessive
16
In the Punnett square below, the offspring show...
four possible outcomes
two different genotypes
three different phenotypes
three different alleles
17
At the end of this process the resulting cells have half the number of chromosomes as the parent
mitosis
meiosis
DNA transcription
protein synthesis
18
Traits are controlled by...
tRNA
chromosomes
mRNA
genes
19
During protein synthesis .... codes onto ...., which then codes on to ... along a ....
genes, DNA, mRNA, tRNA
DNA, mRNA, tRNA, ribosome
DNA, tRNA, mRNA, nucleus
mRNA, tRNA, DNA, ribososme
20
A protein coded as AUCGGCAGGCUUACGGCA codes for _ amino acids.
1
5
7
6
21
...... add amino acids to growing proteins.
tRNA
rRna
mRNA
ribosomes
22
A heterozygous Tt is crossed with a homozygous tt, the probability that a short is produced is:
25%
100%
50%
75%
23
Mendel studied how traits were passed from parent to offspring, a science now known as...
heredity
biology
chromosomes
genetics
24
All of the following are nitrogen bases for tRNA.
adenine, cytosine, guanine, uracil
uracil, cytosine, guanine, adnoids
adenine, cytosine, guanine, duracel
adenine, cytosine, guanine, thymine
25
Which of the following genotypes is homozygous?
Rr
RR
Purebred
FWFB
26
An mRNA code of AAUGCC would code for ..... on tRNA.
UUCAUU
TTACGG
UUACGG
UUCAUU
27
A hybrid is always ...
heterozygous
short
heterogeneous
hematologist
28
The combination of alleles in an organism is a(n)
gene
trait
genotype
phenotype
29
The physical description of an organism is called its ...
trait
phenotype
genotype
appearance
30
The process where a body cell goes through division twice to produce 4 sex cells is called
mieosis
mitosis
miosis
meiosis
31
Traits are passed from parent to offspring on ...
chromosomes
ribosomes
alleles
love
32
An organism that has two identical alleles for a trait is said to be ...
homogeneous
heterozygous
homozygous
homosapien
33
A chart used to see all the possible genotypes that might show up in a cross is called a(n)
Punnet square
Punett square
Punnett square
Punet square
34
Sutton discovered the chromosome theory of inheritance while studying....
grasshoppers
height of pea plants
humans
pea plants
35
An organisms phenotype is determined by the order of the ... along the DNA.
mRNA
nitrogen bases
genes
alleles
