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Genetics Review
Genetics Review
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1
During translation, the tRNA anti-codon GGA codes for what amino acid?
. tyrosine
glutamic
alanine
. proline
2
When a sperm and ovum combine to form a cell, what is this cell called?
zygote
embryo
baby
fetus
3
egg and a sperm cell each have 16 chromosomes.How many will their life form they produce have?
8
16
32
64
4
An individual's sex is determined by his or her sex chromosomes. Which is NOT correct?
A zygote with chromosomes XX is female
Sperm carry only the Y chromosome
The sex of the zygote is determined by the sperm
A zygote with chromosomes XY is male
5
An ovum is a(n)
fetus.
embryo
egg.
spermatozoon
6
Which best shows the proper code-structure sequence in protein synthesis?
DNA, mRNA, mRNA, polypeptide, enzyme
enzyme, polypeptide, mRNA, mRNA, DNA
DNA, mRNA, tRNA, polypeptide, enzyme
. mRNA, DNA, mRNA, enzyme, polypeptide
7
Which describes a current use of genetic engineering?
identifying hereditary diseases
vaccinating a child for measles
treating cancer with radiation therapy
making human insulin using bacteria
8
Selecting plants or animals with the MOST desirable traits to be bred together.
random breeding
cross breeding
controlled breeding
mixed breeding
9
All chromosomes are composed of
RNA and protein
. DNA and lipids
DNA and protein.
RNA and lipids.
10
skin an muscle cells in humans have 46 chromosomes, how many chromosomes will be present in egg
46
92
115
23
11
The gene for red/green colorblindness in humans is recessive and primarily affects males.why?
located on the X chromosome
located on either the X or Y chromosome
located on both the X and Y chromosomes
located on the Y chromosome
12
What happens during meiosis?
There is an integration of dominant and recessive genes
There is a segregation of dominant and recessive genes
The number of chromosomes decreases from diploid to haploid
The number of chromosomes increases from haploid to diploid.
13
Genetics is the study of
reproduction
Heredity
evolution
Bacteria
14
chromosome going the wrong way during genetic formation producing a zygote with a extra chromos
Down's syndrome
Cooley's anemia
hemophilia
color blindness
15
Which of the following are the basic building blocks of protein?
monosaccharides
amino acids
nitrates
. nucleotides
16
The process of meiosis, which is a special kind of cell division, forms gametes for
growth.
repair
reproduction
replacement
17
An example of nondisjunction would be
manipulation of DNA segments and chromosome microorganisms
abnormality in the number of chromosomes within an organism
unsuccessful DNA cloning of a single-celled organism
a spontaneous mutation occurring naturally in an organism
18
Which of the following events takes place before mitosis and before meiosis in repro organs
nuclear division
RNA redistribution
DNA replication
cell membrane pinching
19
A gene that is sex-linked is BEST described as which of the following?
It results in all female offspring
It results in all male offspring
It is located on the X chromosome.
It is located inside the mitochondria
20
What is (are) formed during replication?
DNA
protein
amino acids
RNA
21
The observed trait that appears in an organism as a result of its genetic makeup is called the
phenotype
genotype
allele
karyotype
22
Which is in the shape of a double helix?
protein
amino acid
enzyme
deoxyribonucleic acid
23
Hemophilia is more common in males than females because it is caused by a
recessive gene found on the Y chromosome.
dominant gene found on the Y chromosome
recessive gene found on the X chromosome
dominant gene found on the X chromosome
24
Which of the following shows how information is transformed to make a protein?
DNA to RNA to protein
ATP to amino acid to protein
cell respiration to ATP to protein
gene to chromosome to protein
25
During meiosis how many times is the DNA replicated?
zero times
one time
two times
four times
26
cell formed by fertilization contains two copies of each chromosome,from mother and father
haploid.
diploid.
an allele
a gamete
27
If the sequence of nucleotides were AGC on a strand of DNA,what would be the sequence on mRNA
TGC
UCG
ACG
TCG
28
The process of meiosis, which is a special kind of cell division, forms gametes for
repair.
replacement.
growth
reproduction
29
Which of the following DNA base pairs are correct?
A-T / T-G
A-A / C-C
A-T / G-A
A-T / T-A
30
Messenger RNA carries genetic information in groups of three bases known as
enzymes.
helixes.
amino acids.
codons.
31
Each pollen grain was created by what type of cell division?
budding
meiosis
mitosis
nuclear fission
32
The mating of individuals with similar genetics can help keep a pure line.
hybridization
Inbreeding
compilation
cloning
33
In living things, whether plant or animal, the carrier of hereditary instructions is
mitochondria in animals, chloroplasts in plants.
messenger RNA.
DNA
genetic vacuole.
34
The uniting of egg and sperm is
. mutation
fertilization.
pollination
germination.
