An organism has 38 chromosomes in a body cell. After mitosis each cell has 38 chromosomes. After meiosis each gamete has ____________________ chromosomes.
Question 30
30.
Question 31
31.
Question 32
32.
Question 33
33.
Question 34
34.
Question 35
35.
For each of the genotypes below determine what phenotypes would be possible.
Purple flowers (P) are dominant to white (p), Brown eyes (B) are dominant to blue (b).
An organism’s expressed physical trait, such as seed color, is called its:
Genotype
Phenotype
Homozygous
Gamete
If the allele for green pea pod color (G) is dominant over the allele for yellow
pea pod color (g), which of the following genotypes would a plant with yellow
pods have?
GG
Gg
gg
None of these
In corn plants, green (G) is dominant to yellow (g). What is the chance of two
heterozygous corn plants producing yellow corn plants?
25%
50%
75%
100%
What information is revealed in the portion of the karyotype above?
The individual displayed is a normal male.
The individual displayed is a normal female.
The individual displayed is a male with Down syndrome.
The individual displayed is a female with Down syndrome.
Which of the following describes an organism that has the genotype Bb?
Homozygous
Heterozygous
Inbreed
All of the above
Genes located on homologous chromosomes may have alternate forms that control
different forms of a trait. These alternate forms of a gene are called _____.
Alleles
Centromeres
Phenotypes
Gametes
What is the genotype in the bottom left-hand quadrant in the Punnett square
shown above?
FF
Ff
fF
ff
A trait carried on the X or Y chromosome is said to be ________ inheritance.
Multiple allelic
Polygenic
Simple dominant
Sex-linked
The alleles contained in _____ produced by each parent are shown along the sides
of a Punnett square.
Zygotes
Offspring
Gametes
Hybrids
A useful device for predicting the possible offspring of crosses between
different genotypes is the _____.
Law of dominance
Law of segregation
Punnett square
Offspring-predictor-machine
Mendel's law of segregation states that during meiosis, the factors that control
each trait separate and only _____ from each pair is/are passed to the
offspring.
One factor
Two factors
The recessive trait
The dominant trait
A couple has two children, both of whom are boys. What is the chance that the
parents' next child will be a boy?
0%
25%
50%
125%
The type of inheritance shown when a red-flowering plant is crossed with a
white-flowering plant and only pink-flowering plants are produced is _____.
Inbreeding
Polygenic inheritance
Codominance
Incomplete dominance
If individual III-2 (XhY)marries a person with the same genotype as individual I-1 (XHXH),
what is the chance that one of their children will be afflicted with hemophilia?
0%
25%
50%
75%
What type of inheritance pattern does the trait represented by the shaded
symbols in the figure above illustrate?
Incomplete dominance
Multiple alleles
Codominance
X-linked
For the trait being followed in the pedigree, individuals II-1 and II-4 in the
figure above can be classified as _____.
Homozygous dominant
Mutants
Homozygous recessive
Carriers
What is the relationship between individual I-1 and individual III-2 in the
figure above?
Grandfather-granddaughter.
Grandmother-grandson.
Great aunt-nephew.
They play golf together occasionally.
An individual of phenotype XBXB marries an individual whose phenotype is XbY.
What is the chance of the couple having a colorblind male if colorblindness is recessive (Xb)?
0%
25%
50%
75%
When red and yellow spotted beetles are mated, 1/4 of the offspring are red, 2/4
are red and yellow spotted, and 1/4 are yellow. This trait is one controlled by
_____.
Multiple alleles
Codominant alleles
X-linked genes
Polygenic inheritance
Two parents who have good health are surprised when their child is born with cystic fibrosis, and autosomal recessive disorder which affects the lungs and digestive system. What are the genotypes of the parents?
Nn and nn
NN and Nn
NN and nn
Nn and Nn
A man heterozygous for blood type A marries a woman heterozygous for blood type
B. The chance that their child will have type O blood is _____.
0%
25%
50%
75%
What is the term for cells with two sets of chromosomes?
Diploid
Monoploid
Triploid
Haploid
What process halves the number of chromosomes in cells?
Fertilization
Replication
Mitosis
Meiosis
What is the significance of crossing-over in meiosis?
Halts cell division
Decreases chromosome number
Increases genetic diversity
Forms identical cells
What is shown in the image above?
independent assortment
anaphase I of meiosis
crossing over
replication
At the end of meiosis, there are
two haploid daughter cells
four haploid daughter cells.
two diploid daughter cells.
four diploid daughter cells.
How many chromosomes are in a human gamete?
43
46
23
26
Which process increases genetic diversity?
Mitosis
Meiosis
Transcription
Translation
How are cells created in mitosis different from those in meiosis?
