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WorksheetsChp 6 & 7 Genetics Practice Test
Total questions: 55
Worksheet time: 5hrs 45mins
Chromosomes 1 through 22; chromosomes that contain genes for characteristics not directly related to the sex of an organism.
Homologous chromosome
Autosome
Sex chromosome
gamete
Two chromosomes - one from the mother and one from the father - that have the same length and general appearance
Homologous chromosome
Autosome
Sex chromosome
gamete
Sex cells - egg cells and sperm cells
somatic cell
gamete
daughter cell
sister chromatid
Is the following cell diploid or haploid?
Diploid
Haploid
All human have _________ chromosomes
23
46
Diploid
Haploid
Fusion of two gametes that results in offspring that are a genetic mixture of both parents. Take 2 haploid cells and makes a diploid cell.
Sexual reproduction
Fertilization
Autosome
Somatic cell
1n indicates that the cell is ____.
Diploid
Haploid
Cells with little more than DNA that are eventually broken down in the female body
Somatic cell
Crossing over
Polar Body
Gametogenesis
the process in which cells undergo meiosis to form gametes.
Gametogenesis
Fertilization
Meiosis
Nondisjunction
The diagram shows homologous chromosomes during prophase I of meiosis. Which of the following correctly describes the process being illustrated?
Segregation of sister chromatids
Mutation in which the DNA content of the gene is altered
Crossing over in which alleles are exchanged
Condensation and segregation of alleles
The diagram shows the process of crossing over. Which claim about crossing over in chromosomes is best supported by the diagram?
Crossing over increases genetic diversity through deletion.
Crossing over decreases genetic diversity through mutation.
Crossing over increases genetic diversity by creating new combinations of genes.
Crossing over decreases genetic diversity by inserting nucleotides into gene sequences.
The process of crossing over occurs in what phase of meiosis?
anaphase 1
prophase 1
prophase 2
telophase 1
What term denotes the physical expression of a gene?
genotype
phenotype
appearance
homologous
Which of the following would produce a recessive phenotype?
hh
Rr
Ww
BB
Which of the these is homozygous?
gg
Yy
Nn
Ee
Which of the following laws claims that alleles will separate during meiosis, one going to half the sex cells, the other allele going to the other half.
Law of Domination
Law of Segregation
Law of Speciation
Law of Genetics
Which of the following laws claims that alleles will come together independently of each other in the offspring?
Law of Independent Assortment
Law of Probable Expression
Law of Typical Collection
Law of Assorted Assignment
When an organism has two alleles at a particular locus that are different, the organism is called
purebred
dominant
heterozygous
recessive
The passing of traits from parents to offspring is known as....
hierarchy
heredity
traits
genetics
A segment of DNA that has the ability to code for a specific trait.
gene
allele
chromosome
chromatid
A variety or form of a gene.
trait
gene
allele
DNA
A white mouse with red eyes is crossed with a black mouse with brown eyes. The white mouse is recessive for both of its traits. The black mouse is dominant for both of its traits.
This cross would be
BBEE x bbee
BBEe x BbEe
BbEE x BbEe
BBee x BBEE
A male beetle has the genotype Ttbb. If this beetle mates with a female with genotype TTBb, what is the chance their offspring will have the genotype TtBb?
0%
25%
50%
75%
If you have a parent who has GgBb as their genotype, what are the possible alleles they could donate to their gametes? Hint: Use the FOIL method
GB, Gb, gB, gb
GB, GB, gb, gb
Gb, Gb, Gb, GB
GG, BB, gg, bb
A father has type AB blood and the mother has type O. What percentage of their offspring would you expect to have?
Type A, 25%, Type B 25%, Type AB 25%, Type O 25%
Type A 50%, Type B 25%, Type AB 25%, Type O 50%
Type A blood 50%, Type B 50%, Type AB 0%, Type O Blood 0%
Type A blood 100%
What does this Punnett square and the probabilities of the ofspring represent?
incomplete dominance
codominance
The hair form gene shows incomplete dominance. Straight hair (SS) is dominant, curly hair (CC) is recessive, and wavy hair (SC) is heterozygous. Mr. and Mrs. Duncan both have wavy hair (SC). What percentage of their children will also have wavy hair (SC)?
25%
50%
75%
100%
A red flowered plant (RR) is crossed with a white flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (RW) flowers?
0%
25%
50%
100%
What type of inheritance pattern is shown here?
Codominance
Incomplete dominance
The blending of two traits where the heterozygous phenotype is intermediate between the two homozygous phenotypes is known as ---
incomplete dominance
codominance
Which of the following is NOT a sex-linked trait?
Color-blindness
Hemophilia
Huntington disease
What is the probability of two cystic fibrosis carriers having a child with cystic fibrosis? (Hint, it's an autosomal recessive disorder)
0%
25%
50%
100%
What does the genotype look like for someone who is a carrier?
CC
Cc
cc
CCC
What process occurs during meiosis that can result in chromosomal disorders?
crossing over
non-disjunction
anaphase I
prophase II
Which of the following statements can be determined from the karyotype below? (3.2.2)
it is a normal female
it is a female with Down Syndrome
it is a normal male
it is a male with Down Syndrome
Chromosomal disorder where a male has an extra X chromosome(3.2.2)
Down syndrome
Turners
Jacobs
Klinefelter's
If this pedigree shows a recessive disorder, what MUST the genotype of individual II-3 be?
HH
Hh
hh
The trait this pedigree traces is recessive because it skips a generation and individuals can be carriers. What is the most likely genotype for person III-3?
GG
Gg
gg
On a pedigree, this symbol represents a ----
not affected male.
not affected female.
affected male.
affected female.
On a pedigree, this symbol represents a ---
not affected female.
not affected male.
affected male.
affected female.
