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BIOL 151 Unit 3 Assignment Spr 2020

Name_________________________________ Lab Section______________
BIOL 151 – Spring 2020
Dr. Gulrud
Assignment #3 Unit 3 Review of Chapters 10-12
Instructions: Read the corresponding textbook chapters, listen to the lecture recordings and
animations, and check your understanding with Kahoot. Then answer all of the following questions and
submit your completed worksheet to the D2L dropbox before 11:59 pm on April 11th. Late assignments
will only be accepted in excusable circumstances verified with documentation. An answer key will be
posted on D2L Brightspace on April 12th. You are strongly encouraged to review the answer key to help
prepare for your unit exam. Be sure to include your name and lab section.
Chapter 10 Cell Cycle (Cell Division)
1) Place the following phases of the cell cycle in order, beginning with G1
(M phase, Cytokinesis, S phase, G2)
G1 → ______________→ ______________ → ______________ → ______________ → G1
2) Describe each of these proteins, their roles in cell division and .whether they function in Bacteria or
a. Histones/Nucleosomes
b. Synaptonemal complex
c. Kinetochore proteins
d. Cohesin
e. FtsZ
3) Label sister chromatids, cohesin, and homologous chromosomes in the following electron
micrograph of 2 human chromosomes.
4) Place the following phases of Mitosis in order as they occur during mitosis and state the key events
that occur during each phase.
(Anaphase, Metaphase, Prometaphase, Telophase, Prophase)
Key Events
5) Name the phase of MITOSIS that each of the following cells represents. Note that this cell is a diploid
eukaryote that has 2 pairs of chromosomes for a total of 4 chromosomes (analogous to humans
having 23 pairs of chromosomes for a total of 46 chromosomes).
Chapter 11 Meiosis
6) What is separated during each of the following phases of Meiosis?
a. Anaphase I:
b. Anaphase II:
7) In what phase of Meiosis does crossing over occur?_______________________________
8) Circle the correct answer. Meiosis I / Meiosis II is most similar to Mitosis.
9) Fill in the blank with a number.
Mitosis in diploid cells produces _______ identical cells, each with _____ copies of every
gene/chromosome while Meiosis produces ________ non-identical cells, each with ______ copy of
every gene/chromosome.
10) What cells undergo meiosis?_______________________________________
Chapter 12 Inheritance
11) Monohybrid crosses helped Mendel develop the principle of _____________ while dihybrid crosses
helped him develop the principle of _____________.
12) Explain how the white flower color trait was able to “Hide” in the F1 generation of Mendel’s
monohybrid cross of pea plants.
13) Mendel’s monohybrid crosses yielded an F2 phenotypic ratio of ____________ while his dihybrid
crosses yielded a phenotypic ratio of _______________________.
14) During his experiments with pea plants, Mendel referred to the trait that was expressed in the F1 or
first filial generation as _________ .
a. Dominant
b. Recessive
c. Homozygous
d. Codominant
15) Juvenile Glaucoma is a human condition that results in blindness and is caused by a dominant allele.
Draw a Punnett Square to determine the expected genotypic and phenotypic ratios of a cross
between a Heterozygous blind individual and a normal individual
(use G = Glaucoma allele and g = normal allele).
a. Genotypic Ratio:
b. Phenotypic Ratio:
c. Describe what percentage of this couples children would be expected to have Glaucoma.
d. If this couple has 4 children, is it possible for all 4 of them to have normal vision? Why?