Mendel found that if he crossed a pure bred white-flowered pea plant with a pure bred purple-flowered pea plant:
A. half of their offspring were usually white and half were usually purple
B. All of the offspring were purple
C. All of the plants were white
D. The results were unpredictable
Why would it be important to replicate DNA before a cell divides in mitosis or meiosis?
A. In order for genetic information to be transferred into daughter cells.
B. In order for the cell to be able to increase in size.
C. In order for the DNA to be contained in the nucleus.
D. In order for the cell to re-order the DNA sequencing in the new cells.
A recessive allele on the X chromosome will always produce the trait in a male.
How many phenotypes are there in ABO blood types?
What are the blood types of the possible children that a woman (type O) and man (type AB) can have?
A. O and AB
B. O and A
C. O and B
D. A and B
One form of a gene is called_______________
A. a DNA
B. a Phenotype
C. a trait
D. an allele
Meiosis results in the production of
A. 2 diploid cells
B. 2 haploid cells
C. 4 haploid cells
D. 4 diploid cells
A plant with two dominant OR two recessive alleles is said to be…
A. homozygous or true-breeding.
B. heterozygous or cross-breeding.
C. incomplete dominance.
How much of your DNA do you inherit from your mom?
D. it varies
In pea plants, white flower color is recessive. In order to inherit white flower color, a pea plant must receive
A. at least one allele for white flower color from one parent.
B. at least one allele for purple flower color from one parent.
C. an allele for white flower color from each parent.
D. two dominant alleles.
A ______________ is a person who has one normal or dominant allele for a trait and a recessive or abnormal allele for a trait.
What is the definition of the phenotype?
A. The physical characteristics of an organism
B. The genetic makeup of an organism
C. The letters eg, A C G T
During meiosis, the nucleus of the parent cell divides
C. three times
D. four times
In guinea pigs, the allele for short hair (H) is dominant and the allele for long hair (h) is recessive. When a dominant homozygous male and a heterozygous female are bred together, what is the predicted phenotypic ratio for the offspring?
A. 1:1 short hair to long hair
B. All have short hair
C. 1:3 short hair to long hair
D. 1:3 long hair to short hair
What is the correct term for a structure which contains the genetic material (DNA) and serves as the control center of the cell?
C. cell membrane
How many chromosomes do humans have?
A human body (somatic) cell usually has how many chromosomes?
The image shows the pattern of inheritance for colorblindness. From this diagram we can tell that colorblindness is
A. a codominant trait
B. a sex-linked trait
C. carried on the Y chromosome
D. is associated with a dominant allele
If a somatic (body) cell in a butterfly contains 24 chromosomes, a butterfly egg would contain
Which one of the following statements is NOT true?
A. Genes are the only influence on traits.
B. Several genes can influence a single trait.
C. The environment can have an influence on traits.
D. One gene can influence many traits.
Why do we need meiosis?
A. To double the number of chromosomes going into sex cells
B. To halve the number of chromosomes going into sex cells
C. To triple the number of chromosomes going into sex cells
D. To not change the number of chromosomes going into sex cells
Meiosis makes sperm and egg cells. In humans, sperm and egg cells each have _____ chromosomes. Therefore a fertilized human egg cell (sperm and egg cell combined) would create a cell with _____ chromosomes.
A. 23, 46
B. 46, 23
C. 2, 4
D. 50, 100
What is a chromosome?
A. A long strand of DNA
B. A tiny piece of DNA
C. A cell wall
D. A mitochondria
What gender of offspring are most often affected by sex-linked inheritance? What gender are usually carriers of the trait?
A. males, males
B. females, males
C. males, females
D. females, females
What is the diploid number in human cells?
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