Unit 3 – Heredity Genetics and Evolution – Quiz 2
Name: ________________________________________________________________________________________________________________Block:_______
1. In the process of meiosis, sex cells are produced. After meiosis, which process restores the normal 2n chromosome
number of the species for the next generation?
A. metamorphosis
B. mitosis
C. fertilization
D. meiosis
2. For many vertebrates that live in water, reproduction involves external fertilization. What happens during this type of
fertilization?
A. Sex cells join outside the body of the female.
B. Sex cells join in the moist reproductive tract of the female.
C. Offspring produced have twice as many chromosomes as each of the parents.
D. Offspring produced have only half the number of chromosomes as each of the parents.
The diagram below represents a reproductive process that takes place in humans.
3. The diagram below shows the process of
A. cellular respiration
B fertilization
C. photosynthesis
D. asexual reproduction
4. Which statement about the process above is not true?
A. The normal species chromosome number is restored.
B. Males and females each give DNA to the offspring.
C. The fertilized egg will develop to become the same as the dominant parent.
D. The sex of the fertilized egg is determined by DNA in the sex cells.
5. ________ are the structures in the nucleus of a cell that contain hereditary information.
A. Mitochondria
B. Chromosomes
C. Cytoplasm
6. A chromosome is best described as
A. a strand of protein and fat
B. a cell nucleus
C. a sex cell
7. DNA is passed to offspring through
A. genes
B. cells
C. bacteria
8. Genes are made up of
A. nuclei
B. DNA
D. Chloroplasts
D. a thread of DNA and protein
D. organs
C. chromosomes
D. ATP
9. A section of a chromosome that contains specific hereditary information is called a
A. gene
B. vacuole
C. cell membrane
D. hormone
10. Which sequence shows the most complex structure to the least complex structure?
A. gene – DNA – chromosome
C. gene – chromosome – DNA
B. DNA – gene – chromosome
D. chromosome – gene – DNA
11. In humans, eye color can be determined by pairs of
A. organs
B. sibling
C. genes
D. cells
12. Which of the following would be contained in a pair of chromosomes?
A. specific genes
B. egg cells
C. sperm cells
D. hormones
13. The diagram shows two paired homologous chromosomes. What do R and r represent?
A. two different forms of a gene
C. two identical genes
B. two gametes that can form a zygote
D. two chromosomes in a hybrid pea plant
14. To find out who the biological parents are, adopted children sometimes request DNA tests. These tests involve
comparing DNA samples from the child to DNA samples taken from the parents. Possible relationships may be
determined from these tests because
A. the base sequence of the father determines the base sequence of the offspring
B. the DNA of parents and their offspring is more similar than the DNA of nonfamily members
C. the position of the genes on each chromosome is unique to each family
D. the mutation rate is the same in closely related individuals
15. Which statement is true about every human cell?
A. Every human cell contains a copy of all the information needed to make a human being.
B. Every human cell functions in the same way.
C. Every human cell has the same structure.
D. Every human cell contains one pair of genes.
16. What is the scientific term for the combination of genes? (examples: Aa, AA, aa)
A. gametes
B. genotype
C. phenotype
D. traits
17. What is the scientific term for the way an organism looks or the way it behaves?
A. Genotype
B. physical appearance
C. phenotype
D. physique
18. Which of the following statements is correct?
A. a recessive trait will show if two dominant genes are present
B. a recessive trait will show if one recessive gene is present
C. a recessive trait will show if two recessive genes are present
D. a recessive trait will show if one dominant gene is present
19. Which of the following statements is correct?
A. a dominant trait will show if one or two dominant genes are present
B. A dominant trait will show no matter if a dominant gene is present
C. A dominant trait will show if two recessive genes are present
D. A dominant trait will never show if a recessive gene is present
20. A pea plant’s height can either be tall or short, not medium. Which of the following genotype/phenotype pairs is
correct if short is recessive.
A. tall = t
B. tall = tt
C. short = T
D. short = t
21.
22.
23.
24.
hh
BB
Rr
Hh
The allele pair to the left is for the curliness of hair trait. If H = dominant (curly hair) and h = recessive
(straight hair) which phenotype will the organism show?
A. Curly hair
B. wavy hair
C. straight hair
D. curly and straight hair
The genotype to the left is for the color of rabbit fur. If B = black and b = white, which phenotype will the
organism show?
A. black
B. white
C. black and white
D. gray
The genotype to the left is for color in a flower. If S = red and s = white, which phenotype will the
organism show?
A. red
B. white
C. pink
D. red and white
The genotype to the left is for the curliness of hair trait. If H = curly and h = straight, which phenotype will
the organism have if the organism is showing incomplete dominance?
A. curly hair
B. straight hair
C. wavy hair
D. curly and straight hair
25. Which of the following is correct?
A. an organism must have both dominant genes to show the dominant phenotype
B. two organisms may have the same phenotype but different genotypes
C. you can automatically tell an organisms genotype just by looking at its phenotype
D. A recessive trait cannot be hidden by the dominant form of a trait