Exam (elaborations)
B101 Week 6 Experiment Answer Sheet
- Course
- Institution
B101 Week 6 Experiment Answer Sheet
[Show more]
Seller
Follow
solutions
Reviews received
Content preview
WEEK 6 EXPERIMENT ANSWER SHEETPlease submit to the Week 6 Experiment dropbox no later than Sunday midnight.
Component Expectation Points
Correctly perform and record the outcome of five monohybrid crosses
5
(Table 1).
Experiment 6 Demonstrate an understanding of the possible outcomes of
Exercise 1 monohybrid crosses with respect to genotypes and phenotypes
(Questions 1-2). 4
See Q #1
Experiment 6 Determine the correct parental gametes and conduct a dihybrid cross. 5
Exercise 2 Correctly evaluate the outcome of a dihybrid cross (Questions 1-2). 6
Correctly recognize one’s phenotype and assigns the correct genotype
4.5
(Table 2). See Table 2
Experiment 6
Exercise 3 Demonstrate an understanding of dominant and recessive traits,
genotype vs phenotype and homozygous vs heterozygous (Questions 5
1-6). See Q #6
m
er as
TOTAL 29.5 pts
co
eH w
o.
Experiment 6 Exercise 1: Monohybrid Crosses
rs e
ou urc
You will be conducting monohybrid crosses using fruit flies. Open in the following website:
Glencoe-McGraw Hill. No date. Punnett Squares
o
http://glencoe.mcgraw-hill.com/sites/dl/free/0078759864/383934/BL_05.html
aC s
vi y re
Procedure
A. Open the above website and click on the VCR to listen to the introduction. Close the window
ed d
when done.
ar stu
B. Click on the Lab Notebook on the lab bench. A breeding scenario will be presented to you that
you will need to carry out. Here are the possible phenotypes and genotypes you will using:
is
a. Normal wings (LL or Ll) or vestigial wings (ll)
Th
b. Gray body (GG or Gg) or black body (gg)
C. Enter the Scenario number in Table 1 below.
sh
D. Based on the Scenario, use the down arrows beneath the Parent 1 and Parent 2 boxes to select
the appropriate parents. Look carefully at the flies so that you know which ones to select.
E. Before proceeding, click on the Check Parents button. If necessary, make corrections. If you
are correct, the maternal and paternal alleles will be added to the Punnett Square.
Updated October 2013
This study source was downloaded by 100000805705997 from CourseHero.com on 11-03-2021 21:20:12 GMT -05:00
https://www.coursehero.com/file/18046658/BIO-Wk6-Exp-w-correct/
, F. Next, drag the correct allele combinations and the corresponding fly types to the boxes in the
Punnett Square.
G. When you are done, click on Check Offspring. If necessary, make corrections.
H. Record your data in Table 1 below. An example has been given, but note that the example is
not using the genotypes and phenotypes used in this exercise.
I. Click on Reset. Repeat steps B - H four more times for a total of five crosses. If a scenario is
presented that has already been completed, click Reset again. DO NOT REPEAT a given
scenario!
Note that the scenario number you need to record in the Table below is the number associated
with the specific scenario you completed.
Table 1. Results of crosses.
m
er as
Parent Genotypes Offspring Genotypes Offspring Phenotype
co
Scenario # Parent 1 Parent 2 # % # %
eH w
2 Rr 50% Rr 2 red 50% red
o.
Example Rr rr
rs e 2 rr 50% rr 2 white 50% white
ou urc
8 GG Gg 4Gg 100% Gg 4 gray flies 100%gray
2 Homo
2LL 50% LL Long Wing 50% Homo
o
4 LL Ll
2Ll 50% Ll 2 Hetero 50% Hetero
aC s
Long Wing
vi y re
2GG 50% GG 100% gray
6 GG Gg 4 gray flies
2Gg 50% Gg flies
ed d
50% long
50% LL 2 long wing
ar stu
2 Ll wing
7 Ll ll 50% ll 2 vestigial
2 ll 50%vestigial
wing
wing
is
2Gg 50% Gg 2 gray 50% gray
1 Gg Gg
2gg 50% gg 2 black 50% Black
Th
Questions
sh
1. Which type of cross gave you the greatest number of genotypes? Was the number of
phenotypes the same as the number of genotypes or different? If different, why (2 pts)?
LL/GG and Gg/Ll gave me the greatest number of genotypes. Yes the number of phenotypes as
well as gentotypes. No there wasn’t a difference.
Updated October 2013
This study source was downloaded by 100000805705997 from CourseHero.com on 11-03-2021 21:20:12 GMT -05:00
https://www.coursehero.com/file/18046658/BIO-Wk6-Exp-w-correct/
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller solutions. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $2.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
81113 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now