2. Midterm 1 Version A Sect B answers (fill in blanks)

2 Midterm 1 - 
 Section
B:
Answer
the
following
by
filling
in
the
blank
with
the
appropriate
response.
 


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Unformatted text preview: 
 Section
B:
Answer
the
following
by
filling
in
the
blank
with
the
appropriate
response.
 
 24. (1
mark)
The
 β‐globin
gene
has
many
alleles.

What
is
the
total
number
of
different
alleles
of
the
 β‐ globin
gene
that
could
be
carried
by
6
children
with
the
same
mom
&
dad.
_4_
 
 25. (1
mark)
 A
human
somatic
cell
contains
approximately
13
picograms
(pg)
of
DNA
in
the
G1
phase.

 How
any
picograms
of
DNA
are
expected
in
a
gamete
produced
by
this
individual?
_6.5_
pg
 
 26. (2
 marks)
 Two
 individuals
 of
 genotype
 AABBCCDD
 and
 aabbccdd
 are
 mated.
 The
 F1
 generation
 is
 interbred
 (self‐fertilized)
 to
 yield
 3000
 progeny.
 
 What
 proportion
 of
 the
 F2
 is
 expected
 to
 be
 AabbCcDD?
 
 ___1/64_(this
 question
 asked
 for
 proportion,
 which
 is
 a
 fraction;
 if
 you
 gave
 the
 absolute
number
(47),
you
got
1
of
the
2
marks
available
for
this
question.)___
 
 27. (1
mark)
 Tasha
and
Dimitri
are
both
carriers
of
the
autosomal
recessive
condition
halitosis.
If
they
 have
 3
 children,
 what
 is
 that
 probability
 that
 one
 will
 be
 affected
 and
 two
 will
 not,
 regardless
 of
 order?
____
(1/4)
(3/4)
(3/4)
+
(1/4)
(3/4)
(3/4)
+
(1/4)
(3/4)
(3/4)
=
27/64
 
 
 ...
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This note was uploaded on 01/10/2010 for the course BIOLOGY biol2040 taught by Professor Tamarakelly during the Fall '09 term at York University.

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