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2ND QUARTER STUDY GUIDE
Name_____________________________________Date_______________________Period____________________
Seventh Grade Science EQT Study Guide Second Quarter 2016. This is meant to be a
guide. This is NOT the actual test.
1. How many chromosomes are present in a normal human sex cell?
2. Different forms of a gene that are inherited from each parent are
called________________.
3. If the body cells of an organism have 10 chromosomes, then the sex cells
produced during meiosis would have__________________chromosomes.
4. What are homologus chromosomes?
5. On what structure are genes found?
6. Label the following items on the chromosome below (centromere, genes,
chromatid)
7. What makes up chromosomes?
8. What is meiosis?
9. Mitosis produces _______cells, while meiosis produces ________cells.
10. How many cells are produced during meiosis?
11. How many cells are produced during mitosis?
12. How many chromosomes are present in a normal human sex cell?
2ND QUARTER STUDY GUIDE
Name_____________________________________Date_______________________Period____________________
13. If the body cells of an organism have 10 chromosomes, then the sex cells produced
during meiosis would have__________________chromosomes.
14. What is the haploid number of chromosomes for a human sperm or egg cell?
15. What is the number of chromosomes in a body cell known as?
16. Who is responsible for discovering the structure of DNA (two names)?
17. _______________stands for deoxyribonucleic acid.
18. _______________stands for ribonucleic acid.
19. In RNA:
a. Adenine pairs with_____________
b. Guanine pairs with_____________
20. In DNA there are __________different bases.
a. Adenine pairs with____________
b. Guanine pairs with____________
21. What does the mRNA do?
22. A ___________________is a change in an organism’s gene or chromosome. It can
be harmful or helpful.
23. A _________________________is something that causes a DNA mutation.
24. If a base is added to a DNA strand what type of mutation happened?
25. If a base is deleted, what type of mutation happened?
26. What is it called to make copies of a DNA strand?
27. What is it called when one base pair replaces the original base pair?
28. What type of mutation occurred?
Original DNA: TTAGTGA
Mutated DNA: TTAGTTGA
2ND QUARTER STUDY GUIDE
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29. What type of mutation occurred?
Original DNA: TTAGTGA
Mutated DNA: TTAGTA
30. What type of mutation occurred?
Original DNA: TTAGTGA
Mutated DNA: TAAGTGA
31. What is the complementary strand?
TAAGAGTATGGA
32. What is the corresponding RNA sequence to this stand of DNA?
TAAGAGTATGGA
33. Label the following structures
2ND QUARTER STUDY GUIDE
Name_____________________________________Date_______________________Period____________________
Label the following parts of the nucleotide:
a. Phosphate group, sugar, and nitrogen base.
.
34. What is mRNA? What is its job during protein synthesis?
35. What is it called when informations is transferred from DNA to RNA?
36. A pea plant has alleles for green and yellow seed colors. According to Mendel’s law
of segregation of characteristics, what must a gamete of the plant carry?
37. A pea plant has white flowers and yellow seeds. What does Mendel’s law of
independent assortment say about these traits?
38. A poodle with black fur (BB) is crossed with a poodle with brown fur (bb). Using a
Punnett square, what is the probability that the offspring will be black?
2ND QUARTER STUDY GUIDE
Name_____________________________________Date_______________________Period____________________
39. Alleles for different traits are distributed to sex cells & offspring independently
of one another. This is an example of which of Mendel’s laws?
40. An organism with the genotype Dd is crossed with an organism of the same
genotype. Using a Punnett square, what is the RATIO of offspring displaying the
dominant allele to offspring displaying the recessive allele?
41. During the formation of gametes, the two alleles responsible for a trait separate
from each other. Alleles for a trait are then “recombined” at fertilization,
producing the genotype for the traits of the offspring. This is an example of which
of Mendel’s laws?
42. If two first-generation self-pollinating plants are crossed, Pp x Pp, what is the
PROBABILITY that offspring plants will show the recessive trait, pp?
43. If you cross two rabbits that have the genotype Bb, how many possible
GENOTYPES can be found in the offspring?
44. In a cross of parents that are pure for contrasting traits, only one form of the
trait will appear in the next generation. Offspring that are hybrid for a trait will
have only the dominant trait in the phenotype. This is an example of which of
Mendel’s laws?
2ND QUARTER STUDY GUIDE
Name_____________________________________Date_______________________Period____________________
45. In a plant, tall (D) is the dominant allele. Short (d) is the recessive allele. Which
GENOTYPE would a short offspring have?
46. What are the possible genotypes of the offspring if you cross a white flower (with
the genotype pp) with a purple flower (with the genotype PP)?
Complete the following crosses and give the probability for genotypes and phenotypes:
Mother: Pp
Father: pp
P=purple hair
p= pink hair
Phenotypes:
Genotypes:
Mother: Tt
Father:Tt
T=tall
t= short
Tt=medium height
Phenotypes:
Genotypes:
2ND QUARTER STUDY GUIDE
Name_____________________________________Date_______________________Period____________________
47.
48. What is a pedigree chart?
49. Please indicate the symbol for each item below:
Normal Male-
Affected Male-
Carrier Male-
Normal Female-
Affected Female-
Carrier Female-
Marriage
Children
2ND QUARTER STUDY GUIDE
Name_____________________________________Date_______________________Period____________________
50. Using the pedigree below answer the following questions:
How many individuals will have black fur?
How many females will have black fur?