BIO 340 (Holechek) EXAM 2 STUDY
QUESTIONS CORRECTLY ANSWERED
ARIZONA STATE UNIVERSITY
What is the distance between these genes?
Correct Answer -22 centimorgans
if you know what
the expected is based on Mendel results
or
genetic analyses performed on a specific locus you would use what
equation for degrees of freedom
Correct Answer -n-1
if you
have to
calculate the expected genotype frequencies you would have to use what
equation for degress of freedom
Correct Answer -n-1-1
n stands for number of ____ in degrees of freedom equations
Correct Answer -genotypes
,The slash in the slash notation is simple the speration of the alleles between
the two ____
Correct Answer -homologs
You are looking at the results of a three point tests cross and you see two
values that are very low. These must be the ____ recombinants.
Correct Answer -double
Mutations to different genes can produce the
same _____.
Correct Answer -Phenotype
What determines the number of genes that causes a mutant phenotype?
Correct Answer -complementation test
Loss-of-function mutations are recessive
if the normal allele is ____.
Correct Answer -haplosufficient
Loss-of-function mutations are dominant
if the normal allele is ____.
Correct Answer -haploinsufficient
A ______ phenotype is produced when
an organism has two copies of the wild
,type allele
Correct Answer -wild type
situation in which both alleles of a gene contribute to the phenotype of the
organism
Correct Answer -Codominance
What disease is caused by a recessive mutation in the
PAH gene
Correct Answer -Phenylketonuria (PKU)
_______ gene encodes phenylalanine hydroxylase, an enzyme that
converts the amino acid phenylalanine into tyrosine
Correct Answer -PAH
What happens if you're born with Phenylketonuria (PKU) disease and your
body cannot convert phenylalanine into tyrosine?
Correct Answer -Diet changes/ No milk - harmful for babies
(Allelic series of the C gene):
- c^ch produces a "dilute" phenotype called ______.
Correct Answer -chinchilla
(Allelic series of the C gene):
, - wild type allele, C, produced a functional enzyme and ____ ____ ____.
Correct Answer -full coat color
(Allelic series of the C gene):
- c^h produces a phenotype called _______ with
little pigment on the body but full color on the
extremities
Correct Answer -Himalayan
(Allelic series of the C gene):
c is a fully recessive null allele and produces an
______ phenotype
Correct Answer -albino
True or False: You cannot always predict the relative genetic distance from
their physical distance on a chromosome.
Correct Answer -True
What is the relative genetic distance between two linked genes if the
recombination frequency is 0.32?
Correct Answer -32 cM
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