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WorksheetsU4 L9 and L10 Practice
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
1. How are bacterial offspring produced?
a)
A. They are produced when any parent cells combine.
b)
B. They are produced when female bacteria lay eggs.
c)
C. They are produced by both male and female sex cells.
d)
D. They are produced by a parent cell that has divided in two.
2.
2. Asexual reproduction is a process by which
a)
A. two organisms produce offspring that are identical to them and each other.
b)
B. one organism produces offspring with completely different traits.
c)
C. one organism produces offspring that are identical to it and each other.
d)
D. two organisms produce offspring that have completely different traits.
3.
3. How many offspring are produced by a parent bacterium when it divides one time?
a)
A. one
b)
B. two
c)
C. three
d)
D. four
4.
4. Sexual reproduction is the process by which male and female sex cells from two parent organisms
a)
A. combine genetic information to produce offspring.
b)
B. combine genetic information to produce identical parent cells.
c)
C. exchange genetic information in order to separately produce offspring.
d)
D. lose their genetic information before producing offspring.
5.
5. Genetic variation is the
a)
A. different combinations of alleles of genes found in a species.
b)
B. different combinations of cells across all organisms.
c)
C. term used to describe identical offspring with only slightly different traits.
d)
D. term used to describe multiple offspring of different genetic makeups.
6.
6. Which of these is true of organisms that produce sexually?
a)
A. Most multicellular organisms reproduce sexually.
b)
B. Some unicellular organisms reproduce sexually.
c)
C. Most animals, plants, and many fungi reproduce sexually.
d)
D. all of the above
7.
7. How many chromosomes are in a human sex cell?
a)
A. 2 chromosomes
b)
B. 23 chromosomes
c)
C. 46 chromosomes
d)
D. 92 chromosomes
8.
8. How can a scientist determine which chromosome from each chromosome pair will go into a sex cell?
a)
A. There are no chromosomes in sex cells.
b)
B. The chromosomes that go into sex cells are randomly determined.
c)
C. Only odd numbered chromosomes go into the sex cell.
d)
D. The chromosomes that go into sex cells are larger than the chromosomes that do not.
9.
9. What happens when human egg and sperm cells unite?
a)
A. The egg and sperm cells lose their chromosomes.
b)
B. The fused eggs and sperm divides in half and makes a new egg cell and a new sperm cell.
c)
C. The fused cells form a single cell that will divide many times to develop into an offspring.
d)
D. The fused cells form a single cell that grows very large to form an offspring.
10.
10. Why are siblings born at different times not identical to each other?
a)
A. Siblings inherit different combinations of alleles from each parent.
b)
B. Siblings inherit older chromosomes depending on when they are born.
c)
C. Siblings inherit chromosomes based on the time of year they are born.
d)
D. Siblings inherit different chromosomes based on how long they are in the womb.
11.
11. How many possible combinations of one chromosome pair could a person inherit?
a)
A. 4
b)
B. 23
c)
C. 46
d)
D. 92
12.
12. How likely is it that an offspring will inherit one combination of chromosomes over another?
a)
A. An offspring is more likely to inherit the chromosomes of the female parent.
b)
B. An offspring is more likely to inherit the chromosomes from their older parent.
c)
C. An offspring is equally likely to inherit any one of the possible chromosome combinations.
d)
D. An offspring is more likely to inherit the chromosomes from their younger parent.
13.
13. What is probability?
a)
A. the study of how cells work together
b)
B. random testing of scientific events
c)
C. the chance that a specific outcome will occur each time an event happens
d)
D. the final results of an experiment
14.
14. What did Gregor Mendel study?
a)
A. the probability of trait inheritance in humans
b)
B. the inheritance of traits in flowers and plants
c)
C. the number of chromosomes in plants and animals
d)
D. the structures of genes
15.
15. What happened when Gregor Mendel bred a true-breeding tall plant with a true-breeding short plant?
a)
A. The plants bred tall plants in the first generation, and a both tall and short in the second.
b)
B. The plants bred all short plants in the first generation, and all short in the second.
c)
C. The plants bred all tall plants in the first generation, and all short in the second.
d)
D. The plants bred a mixture of tall and short plants in all generations.
16.
16. A dominant allele is an allele that
a)
A. is expressed only when two copies are present.
b)
B. is expressed even if only one copy is present.
c)
C. is expressed when at least two copies are present.
d)
D. can be expressed when any number of copies are present.
17.
17. Which of these is NOT true about recessive alleles?
a)
A. Recessive alleles are expressed when there is one copy present.
b)
B. Recessive alleles can be carried from one generation to the next.
c)
C. Recessive alleles reappear by being expressed in a later generation.
d)
D. Recessive alleles are masked by dominant alleles.
18.
18. How does a Punnett square display information?
a)
A. A Punnet square is a model that scientists use to understand probability.
b)
B. A Punnet square is a list that tracks how offspring inherit parents’ alleles.
c)
C. A Punnet square is a diagram that shows how parents’ alleles for a trait might combine in offspring.
d)
D. A Punnet square is a flow chart that shows how alleles are transferred from parent to offspring.
19.
19. What is the likely outcome for the blood type of an A allele and a B allele combining in an offspring?
a)
A. Type A
b)
B. Type B
c)
C. Type AB
d)
D. Type O
20.
20. What is the expected outcome of the offspring of two true-breeding plants practiced by Gregor Mendel?
a)
A. Two tall plants have tall offspring.
b)
B. Two tall plants have short offspring.
c)
C. Two short plants have tall offspring.
d)
D. A tall plant and a short plant have short offspring.
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