BIO 350 – Patterns in Human Inheritance Traits

14 Jun BIO 350 – Patterns in Human Inheritance Traits

Question
Experiment

HUMAN GENETICS

Human
Genetics
Margaret E. Vorndam,
M.S.
Version 42-0068-0001

LAB REPORT ASSISTANT
This document is not meant to be a substitute for a formal laboratory report. The Lab
Report Assistant is simply a summary of the experiment’s questions, diagrams if
needed, and data tables that should be addressed in a formal lab report. The intent is to
facilitate student’s writing of lab reports by providing this information in an editable file
which can be sent to an instructor

OBSERVATIONS
Data Table 1: Single-gene Traits of a Selected Population
Subject # >

1

XX Female

2

3

4

5

6

7

8

9

10

11

12

XX

XY Male
FF,Ff = unattached
ff = attached

ff

RR,Rr = roller

R

rr = can’t roll
SS,Ss = straight thumb
ss = bent thumb

ss

MM,Mm = hair
mm = no hair

mm

TT,Tt = left on top

T

tt = right on top
LL,Ll = two tendons

L

ll = three tendons

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Experiment

HUMAN GENETICS

Exercise 1: Patterns in Human Inheritance Traits
QUESTIONS
A. What observations can be made about the collected and charted data?

B. Are any two people exactly the same? If so, how closely are they related?

C. Is your hypothesis supported by the findings? What statistical tool might help you
to make this decision?

D. In the totals that you recorded in Table 1, did you find that the number of dominant
phenotypes were greater than, equal to, or less than the recessive phenotypes?

E. Can you explain what possible genotypes are suggested by this pattern? Does
this vary by trait?

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Experiment

HUMAN GENETICS

F. Would you expect this outcome? Why or why
not?

G. How would changing the level of the mapped traits affect the chart? For instance, if
the alleles for male or female were on the outer rim of the chart, rather than in the
middle, how would the pattern observed differ from Figure 10-1?

H. List several other traits that humans have that are governed by
genetics.

I. Would your data vary if you went to another part of the world, for instance,
China?

J.
Why might collected data show different patterns for different cultural
populations?

K. Would you expect that the pattern would be different if collected 100 years ago
instead of today? Why or why not?

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Experiment

HUMAN GENETICS

L.
If you had percentages of dominant and recessive genes present for the total
number of alleles of a trait for the entire world, would you expect that percentage to
change over 100 years? Why or why not?

Exercise 2: Human Chromosomes and the
Human
Genome
Project
RESULTS
Report on your findings. Your report should be limited to a page in length and may
incorporate the outline of research points above.

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Experiment

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HUMAN GENETICS

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Experiment

HUMAN GENETICS

QUESTIONS
A.
What is the purpose of this
exercise?

B.
What is the prognosis on genetic diseases in the future? Do you believe that
microsurgery to “fix” chromosomal aberrations will some day prevent the diseases that
are listed in the List of Genetically Mediated Diseases in Humans?

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Experiment

HUMAN GENETICS

LABO RATORY SUMMARY
What have you learned from doing this laboratory?

REFERENCES

Copyright © 2008 by Margaret E. Vorndam, 1413 County Road 671, Rye, CO 81069

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