WorksheetsUnit 3 Review
Total questions: 55
Worksheet time: 1hrs 1mins
Two parents have a heterozygous genotype for eye color. What is the chance of having a blue eye baby?
0%
25%
50%
75%
100%
A heterozygous woman marries a man who is homozygous recessive. What are the chances of a curly hair baby?
0%
25%
50%
75%
100%
A homozygous dominant woman marries a man with freckles. What are the chances of a freckled baby?
0%
25%
50%
75%
100%
A heterozygous woman marries a man who is heterozygous. What are the chances of a straight hair baby?
0%
25%
50%
75%
100%
The different forms of a gene
alleles
atoms
proteins
wheels
This trait always shows up in an organism when the allele is present
dominant allele
codominance
probability
recessive allele
This trait is hidden whenever the dominant allele is present
dominant allele
codominance
recessive allele
Punnett Square
A chart that shows all the possible combinations of alleles that can result from a genetic cross
dominant allele
codominance
probability
Punnett Square
B = brown fur b = white fur
In the Punnett square, what is the probability for white fur?
0%
25%
50%
75%
What is one similarity and one difference between mitosis and meiosis?
both go through divisions, but only mitosis makes 4 cells
both have the same number of chromosomes, but differ in number of cycles
both cells contain DNA, but only mitosis has crossing over
both cells replicate the DNA, but meiosis has 1/2 the # of chromosomes as mitosis
If I were to cross a heterozygous with another heterozygous, regardless of the trait, what is the chance of the offspring expressing the recessive trait?
0%
25%
50%
75%
Which of the following would represent homozygous?
AA, BB, rr
AA, Bb, Rr
Aa, Bb, Rr
aa, bb, Rr
In the punnett square below, what belongs in the missing square
The genotype for a yellow plant is...
In the punnett square, what is the probability for white fur?
How many chromosomes are present in a human cell nucleus?
23 chromosomes or 46 pairs
46 pairs or 92 chromosomes
46 chromosomes or 23 pairs
32 chromosomes or 16 pairs
In what type of cells does meiosis take place?
body cells
sex cells
brain cells
skin cells
The daughter cells produced during meiosis are different than daughter cells produced in mitosis because
they each contain genetically diverse information
they contain the same information as the parent cell
they are diploid
they contain no DNA
Sperm and egg are referred to as
recessive
dominant
gametes
babies
What type of reproduction is meiosis associated with?
asexual
sexual
monocrossing
hybridization
How many daughter cells are produced during meiosis
one
two
three
four
if a human cell going through meiosis begins with 46 chromosomes, how many chromosomes will each daughter cell contain?
60
39
23
46
How many cell division processes occur during meiosis
one
two
three
four
When sex cells combine to produce offspring, each sex cell will contribute
twice the number of chromosomes in body cells.
the normal number of chromosomes in body cells.
half the number of chromosomes in body cells.
one fourth the number of chromosomes in body cells.
Where is DNA found in a human cell?
ribosome
nucleus
cell membrane
cytoplasm
If the nucleotides in a strand of DNA are rearranged, what will happen?
The information it codes for will change
the mass of the strand will change
The organism will die
The organism will be more successful
The different forms of a gene are called
factors
alleles
masks
traits
Eye color, hair color, having freckles, etc. are examples of:
DNA
Chromosomes
Genes
Traits
A female has what two sex chromosomes?
(a)
A male has what two sex chromosomes?
(a)
What makes up the SIDES of a DNA ladder?
nitrogen bases
sugars & phosphates
genes & chromosomes
RNA
What makes up the rungs (steps) of a DNA ladder?
sugars & phosphates
nitrogen bases
sugars
genes & chromosomes
