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Genetics
Test Description: Basics of genetics
Instructions: Answer all questions to get your test result.
1) Phenotype is the organism's physical appearance while _______ is the organism's genetic make-up.
A
genetic file
B
physical characteristics
C
gender type
D
genotype
2) If you cross a white flower with the genotype pp with a purple flower with the genotype PP, the possible genotypes in the offspring are
A
all PP
B
all Pp
C
PP and pp
D
all pp
3) Traits such as an individual's skin, hair, and eye color result from
A
one allele from each parent acting together
B
one gene acting alone
C
several genes acting together
D
one dominant allele
4) Part of a mouse's tail is cut off as the mouse escapes from a cat. The mouse later reproduces. Which explanation best describes why the mouse's offspring have long tails?
A
long tails are a recessive trait
B
short tails do not appear in the first generation or the second generation
C
cutting the tail of the mouse changed its genes
D
long tails are a dominant trait
5) DNA, made up of nucleotides, is responsible for:
A
transporting water
B
genetic coding of traits
C
digestion
D
providing food for the cell
6) Different forms of the same genes are expressed as
A
identical twins
B
different traits
C
same traits
D
death
7) Siblings look different even though they come from the same two parents. This is because:
A
All of their traits come from the father
B
Mother and father's traits combine in the same way for each child
C
Mother and father's traits combine in the different ways for each child
D
All of their traits come from the mother
8) Which of the following best describes the difference between the meanings of phenotype and genotype?
A
a phenotype is the appearance of an organism, where as a genotype is the genetic makeup
B
A phenotype is the result of the environment on appearance, whereas a genotype is the result of genes on appearance.
C
a phenotype is the entire genetic makeup of an organism, whereas a genotypes is the combination of genes for one specific tra
D
A phenotype is the result of heterozygous alleles, whereas a genotype is the result of homozygous alleles.
9) The passing of traits from parents to offspring is called
A
probability
B
heredity
C
recessive
D
meiosis
10) Genes carry information that determines
A
ribosomes
B
traits
C
alleles
D
chromosomes
11) Which of the following list the items in order from largest to smallest?
A
cell, chromosome, gene, DNA
B
gene, DNA, chromosome, cell
C
chromosome, cell, DNA, gene
D
cell, chromosome, DNA, gene
12) ____ is another name for homozygous, and ____ is another name for heterozygous.
A
hybrid, purebred
B
dominant, recessive
C
purebred, hybrid
D
different, same
13) Two plants are crossed, resulting in offspring with a 3:1 ratio for a particular trait. This suggests
A
one parent was homozygous dominant and one homozygous recessive
B
that the parents were both homozygous recessive
C
that the parents were both homozygous dominant
D
that the parents were both heterozygous
*select an answer for all questions
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