GENETICS EXAM 2 COMPLETE COURSE
REVIEW GUIDE
◉ non recombinant gamete.
Answer: Gametes that only contain original combination of alleles,
no crossing over
◉ nonrecombinant progeny.
Answer: Possesses the original combinations of traits possessed by
the parents
◉ recombinant progeny.
Answer: The progeny with new combinations of traits formed from
recombinant gametes.
◉ recombinant frequency.
Answer: the proportion of offspring of a genetic cross that have
phenotypes different from the parental phenotypes due to crossing
over between linked genes during gamete formation
◉ coupling.
Answer: Most prevalent gametes are those with two dominant
alleles or those with two recessive alleles. Favors homozygous
,◉ repulsion.
Answer: Gametes containing one dominant and one recessive allele
will be must abundant. Favors heterozygous
◉ genetic map.
Answer: An ordered list of genetic loci (genes or other genetic
markers) along a chromosome.
◉ physical map.
Answer: A genetic map in which the actual physical distances
between genes or other genetic markers are expressed, usually as
the number of base pairs along the DNA.
◉ map unit.
Answer: The distance on a chromosome within which
recombination occurs 1 percent of the time
◉ centimorgan.
Answer: map unit used to measure distance between genes on a
chromosome; one unit of this corresponds to a 1% chance of
recombination occurring between two genes
◉ two point test cross.
, Answer: A test cross used to identify genetic linkage between two
genes and to determine the recombination frequency between the
linked genes
◉ three point test cross.
Answer: A test cross designed to identify genetic linkage between
three genes and to determine the recombination frequency between
the linked genes
◉ interference.
Answer: A measure of the independence of crossovers from each
other, calculated by subtracting the coefficient of coincidence from 1
◉ coefficient of coincidence.
Answer: ratio of observed double crossovers to expected double
crossovers
◉ mapping function.
Answer: Relates recombination frequencies to actual physical
distances between genes
◉ LOD scoring.
Answer: a statistical test often used for linkage analysis in human,
animal, and plant populations
REVIEW GUIDE
◉ non recombinant gamete.
Answer: Gametes that only contain original combination of alleles,
no crossing over
◉ nonrecombinant progeny.
Answer: Possesses the original combinations of traits possessed by
the parents
◉ recombinant progeny.
Answer: The progeny with new combinations of traits formed from
recombinant gametes.
◉ recombinant frequency.
Answer: the proportion of offspring of a genetic cross that have
phenotypes different from the parental phenotypes due to crossing
over between linked genes during gamete formation
◉ coupling.
Answer: Most prevalent gametes are those with two dominant
alleles or those with two recessive alleles. Favors homozygous
,◉ repulsion.
Answer: Gametes containing one dominant and one recessive allele
will be must abundant. Favors heterozygous
◉ genetic map.
Answer: An ordered list of genetic loci (genes or other genetic
markers) along a chromosome.
◉ physical map.
Answer: A genetic map in which the actual physical distances
between genes or other genetic markers are expressed, usually as
the number of base pairs along the DNA.
◉ map unit.
Answer: The distance on a chromosome within which
recombination occurs 1 percent of the time
◉ centimorgan.
Answer: map unit used to measure distance between genes on a
chromosome; one unit of this corresponds to a 1% chance of
recombination occurring between two genes
◉ two point test cross.
, Answer: A test cross used to identify genetic linkage between two
genes and to determine the recombination frequency between the
linked genes
◉ three point test cross.
Answer: A test cross designed to identify genetic linkage between
three genes and to determine the recombination frequency between
the linked genes
◉ interference.
Answer: A measure of the independence of crossovers from each
other, calculated by subtracting the coefficient of coincidence from 1
◉ coefficient of coincidence.
Answer: ratio of observed double crossovers to expected double
crossovers
◉ mapping function.
Answer: Relates recombination frequencies to actual physical
distances between genes
◉ LOD scoring.
Answer: a statistical test often used for linkage analysis in human,
animal, and plant populations
