50 questions
Human blood type is determined by multiple alleles (A, B, and O). Which ratio would result from a cross between a man with Type AB blood and a woman with Type O blood?
A. 50% Type A, 50% Type O
B. 75% Type A, 25% Type B
C. 50% Type A, 50% Type B
D. 100% Type O
A cross between a red flower and a white flower produces red and white spotted flowers. Which type of inheritance pattern is indicated by these results?
A. polygenic
B. codominance
C. multiple alleles
D. incomplete dominance
Coat color in a dog breed is determined by incomplete dominance where three colors are produced (Brown, tan and white), and the brown coat allele (B) has incomplete dominance over the white coat allele (b). Which offspring ratio would be expected from a cross between a brown dog and a white dog?
A. 2 BB: 2 Bb
B. 4 Bb
C. 1 BB: 2 Bb: 1 bb
D. 2 BB: 2 bb
The Punnett square above illustrates a dihybrid cross for cats. The traits are long tail (s), short tail (S), brown hair (B), and white hair (b). What are the genotypes of the parents that produces the probabilities shown in the Punnett square above?
A. Ssbb x ssBb
B. Ssbb x SSBB
C. SsBb x SsBb
D. SSBb x SsBb
A woman develops skin cancer after prolonged exposure to ultraviolet radiation from sun tanning. Would her future children be at risk of inheriting this skin cancer?
A. Yes, if she had a baby after developing skin cancer.
B. Yes, this is a mutation in the DNA of her somatic cells.
C. No, this condition does not affect the woman's egg cells.
D. No, babies cannot get skin cancer because they are immune.
When a plant with red flowers (CRCR) is crossed with a plant that has white flowers ( CWCW), the resulting offspring has pink flowers ( CRCW). If two pink flowers are crossed, what is the probability of having a pink flower?
A. 0%
B. 25%
C. 50%
D. 75%
Males are more likely to suffer from a sex-linked disease or disorder because
males have two X chromosomes
males have less DNA
males have 1 X chromosome, so the disorder is more likely to be expressed
Which of the following genotypes would be a carrier, but not have the disease?
RR
Rr
rr
r
What must occur for a girl to be colorblind?
each parent must be colorblind
each parent must have the dominant allele for colorblindness
each parent must have the recessive allele for colorblindness
her father must have normal vision
It is the transfer of genetic material for the purpose of treating human disease.
chemotherapy
gene therapy
gene transfer
gene editing
It is the gene pair that determines a trait in an individual only if the other memberof the pair is also recessive.
Recessive Gene
Dominant Gene
Genetic Gene
All of the above
How many chromosomes do humans usually have?
twenty-three
four
forty-six
hundreds
What is a genome?
molecular structure
DNA
genes
a complete set of chromosomes
In which stage of MEIOSIS does crossing over occur? (The exchange of genetic material between chromosomes in a tetrad.)
Anaphase I
Metaphase I
Prophase I
Telophase I
What is unique to Prophase I- is that the duplicated chromosomes pair up to form _______.
a centrosome
a tetrad
the mitotic spindle
sister chromatids
Which of the following are CORRECT observations about the differences between MITOSIS and MEIOSIS? (Check all that apply.)
Mitosis produces cells that identical to the parent cell.
Meiosis produces cells that have half the number of chromosomes as the parent cell.
All cells go through INTERPHASE as part of the cell cycle, whether it goes to mitosis or meiosis next.
In both types of cell division, the chromosomes are only duplicated once.
Only in Mitosis, do you see chromosomes pair up to form a tetrad.
Uncontrolled growth can result in:
G0 phase
S phase
Replication
Cancer
Non dividing state of the cell cycle
Interphase
Mitosis
Telophase
Cytokinesis
The division of the cytoplasm is called?
anaphase
mitosis
cytokineses
G0
The division of chromosomes is called?
anaphase
mitosis
cytokineses
G0
After mitosis the number of chromosomes in the newly created cells will be:
Half the number of the original cell
The same number as the original cell
Twice as much as the original cell
Having only one copy of each chromsome
haploid
diploid
triploid
octoploid