Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Pedigree Genetics ProblemS: Autosomal Recessive
Read each scenario, label each individual in each family with their genotype, and answer the questions. If you are not
sure whether an individual, write the allele you do know and a blank "_" next to the allele you know.
For example, if you are not sure if an individual is AA or Aa, you would write A .
Allele Notation Key:
Allele Notation Key:
A = normal pigments
E = wet earwax
e = dry earwax
%3D
a = albino
%3D
%3|
Two people with wet earwax get married and have 4
children. When the fourth child is born, they notice that
this child has dry earwax! Dry earwax is a recessive
allele and more rare in European populations.
There is a recessive allele that causes albinism in
humans. People with albinism lack melanin pigment in
their skin. The following family has many members who
are albinos.
Dry Earwax
Wet Earwax
albino
O normal pigments
ob w
I.
2
II
II
3
4
2
4
III
L Write each individual's genotype in the blank next to
each one.
3. Write each individual's genotype in the blank next to
each one.
2 If individuals I-l and I-2 have a 5th child, what is the
probability that he or she will have dry earwax?
You are a genetic counselor and you meet with a
couple who are planning to have a baby. Fill in
the pedigree on the right with their family
history details. They are concerned that several
members of their family have cystic fibrosis
and they want to you to tell them the
probability that their future child will have
cystic fibrosis, a disorder caused by a recessive
allele. Both the woman and the man have
healthy lungs, but each of them has a sibling
who died from cystic fibrosis at and early age.
The woman has a younger brother who died
from cystic fibrosis and the man has an older
brother who died from cystic fibrosis. The
father's parents were also healthy and the
mother's parents were also healthy.
woH a
Sworel uoy cb w
4. In the space provided on the right, draw a
pedigree for this family. Make sure you include
generation numbers, individual numbers, and a
key to describe your shading choices. Decide
what the probability is that they will have a child
afflicted by cystic fibrosis. Explain your answer
below the pedigree.
(C) Bethany Lau 2016
2.
3.
expand button
Transcribed Image Text:Pedigree Genetics ProblemS: Autosomal Recessive Read each scenario, label each individual in each family with their genotype, and answer the questions. If you are not sure whether an individual, write the allele you do know and a blank "_" next to the allele you know. For example, if you are not sure if an individual is AA or Aa, you would write A . Allele Notation Key: Allele Notation Key: A = normal pigments E = wet earwax e = dry earwax %3D a = albino %3D %3| Two people with wet earwax get married and have 4 children. When the fourth child is born, they notice that this child has dry earwax! Dry earwax is a recessive allele and more rare in European populations. There is a recessive allele that causes albinism in humans. People with albinism lack melanin pigment in their skin. The following family has many members who are albinos. Dry Earwax Wet Earwax albino O normal pigments ob w I. 2 II II 3 4 2 4 III L Write each individual's genotype in the blank next to each one. 3. Write each individual's genotype in the blank next to each one. 2 If individuals I-l and I-2 have a 5th child, what is the probability that he or she will have dry earwax? You are a genetic counselor and you meet with a couple who are planning to have a baby. Fill in the pedigree on the right with their family history details. They are concerned that several members of their family have cystic fibrosis and they want to you to tell them the probability that their future child will have cystic fibrosis, a disorder caused by a recessive allele. Both the woman and the man have healthy lungs, but each of them has a sibling who died from cystic fibrosis at and early age. The woman has a younger brother who died from cystic fibrosis and the man has an older brother who died from cystic fibrosis. The father's parents were also healthy and the mother's parents were also healthy. woH a Sworel uoy cb w 4. In the space provided on the right, draw a pedigree for this family. Make sure you include generation numbers, individual numbers, and a key to describe your shading choices. Decide what the probability is that they will have a child afflicted by cystic fibrosis. Explain your answer below the pedigree. (C) Bethany Lau 2016 2. 3.
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