Answers Part 2

Answers Part 2 - Question 1.

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Unformatted text preview: Question 1. Susan,
a
mother
with
type
B
blood,
has
a
child
with
type
O
blood.

 She
claims
that
James,
who
believes
he
is
type
A
blood,
is
the
father.

 He
claims
that
he
is
not
the
father.
Blood
tests
ordered
by
the
judge

 reveal
that
James
is
indeed
type
A
blood.

 The
judge
rules
that
 
 
A.
James
is
right

he
could
not
be
the
father
of
this
child
 
 B.
Susan
is
right
‐
James
is
the
father
of
the
child
 
 C.
Susan
is
not
the
real
mother
of
the
child

an
error
was
made
in
the
 
newborn
nursery
 

*D.
It
is
impossible
to
make
a
decision
based
on
the
limited
data
available
 Question 2. The judge now asks for DNA tests, which reveal that James is homozygous dominant for type A blood. The judge rules that: * A. James is right - he could not be the father of this child B. Susan is right - James is the father of the child C. Susan is not the real mother of the child an error was made in the newborn nursery D.  It is impossible to make a decision based on the limited data available Explanation: James
is
IAIA , which cannot result in an ii child. Question 3. 
 In
a
heterozygote
of
wild
type
and
null,
a
null
allele
can
be

 recessive
or
dominant.
Explain Recessive +/null has wild type phenotype Wild type gene makes enough product with only one copy, i.e. haplosufficient -- e.g. human PKU (phenylketonuria) Dominant +/null has mutant phenotype Wild type gene does not make enough product with only one copy, i.e. haploinsufficient -- e.g. mouse Tbx1, a transcription factor Question 4. A
temperature‐sensitive
allele:
 A.  Is
expressed
at
the
permissive
temperature
but
not
at
the

 restrictive
temperature
 B.


Is
expressed
at
both
the
permissive
and
restrictive
temperatures
 C.


Encodes
a
protein
that
is
functional
at
the
permissive
temperature

 but
nonfunctional
at
the
restrictive
temperature
 D.


A
and
c
 *
E.


B
and
c
 Question 1. 5
 ...
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This note was uploaded on 09/26/2009 for the course BIS 98659 taught by Professor Kimbrell during the Summer '09 term at UC Davis.

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