EXAM 2 CERTIFICATION TEST
WITH ACCURATE ANSWERS
◉ 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
◉ genetic linkage. Answer: tendency for alleles of genes on the same
chromosome to be inherited together
◉ linkage analysis. Answer: Gene mapping based on the detection of
physical linkage between genes, as measured by the rate of
recombination, in progeny from a cross
◉ haplotype. Answer: A group of alleles of different genes on a
single chromosome that are closely enough linked to be inherited
usually as a unit
◉ single nucleotide polymorphism. Answer: variation in a DNA
sequence occurring when a single nucleotide in a genome is altered
WITH ACCURATE ANSWERS
◉ 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
◉ genetic linkage. Answer: tendency for alleles of genes on the same
chromosome to be inherited together
◉ linkage analysis. Answer: Gene mapping based on the detection of
physical linkage between genes, as measured by the rate of
recombination, in progeny from a cross
◉ haplotype. Answer: A group of alleles of different genes on a
single chromosome that are closely enough linked to be inherited
usually as a unit
◉ single nucleotide polymorphism. Answer: variation in a DNA
sequence occurring when a single nucleotide in a genome is altered
