BSC 170 Exam #1- Wade Nichols UPDATED
ACTUAL Exam Questions and CORRECT
Answers
Mendel Experiment - CORRECT ANSWER - -used peas because they were easy to grow
true-breeding strains -controlled matings: self-fertilization or cross-fertilization -grow to maturity
in one season -observable characteristics with two distinct forms -used 7 visible features, each
with 2 contrasting traits
unit factors exist in pairs - CORRECT ANSWER - genetic characters controlled by unit
factors
dominance/recessiveness - CORRECT ANSWER - in a pair of unit factors; one unit is
dominant, the other recessive
segregation - CORRECT ANSWER - paired unit factors segregate (separate)
independently during gamete formation
independent assortment - CORRECT ANSWER - -traits assort independently during
gamete formation
-all possible gamete combinations form with equal frequency
dominant trait - CORRECT ANSWER - trait that is phenotypically expressed in
heterozygotes
recessive trait - CORRECT ANSWER - trait that is phenotypically expressed ONLY in
homozygotes
genotype - CORRECT ANSWER - -genetic makeup of individual
-organism inherits two alleles, one from each parents
, -alleles written in pairs (DD, Dd, dd)
phenotype - CORRECT ANSWER - physical expression of a trait, how it looked in
Mendel's time
gene - CORRECT ANSWER - unit of inheritance
allele - CORRECT ANSWER - alternative form/version of a single gene
monohybrid - CORRECT ANSWER - crosses looking at one single trait across two
generations
dihybrid - CORRECT ANSWER - -looking at inheritance of two traits in one cross
-generates F2 generation
P1 - CORRECT ANSWER - original parents
F1 - CORRECT ANSWER - offspring of P1
F2 - CORRECT ANSWER - offspring of F1 generation crosses (grandkids of parental)
test cross - CORRECT ANSWER - -Determines if individual displaying dominant
phenotype is homozygous or heterozygous for that trait
-cross between dominant phenotype and homozygous recessive.
-If all offspring of the cross exhibit dominant phenotype, then dominant parent was homozygous
dominant.
-If half of offspring show dominant and half show recessive phenotype then the dominant parent
was heterozygous.
ACTUAL Exam Questions and CORRECT
Answers
Mendel Experiment - CORRECT ANSWER - -used peas because they were easy to grow
true-breeding strains -controlled matings: self-fertilization or cross-fertilization -grow to maturity
in one season -observable characteristics with two distinct forms -used 7 visible features, each
with 2 contrasting traits
unit factors exist in pairs - CORRECT ANSWER - genetic characters controlled by unit
factors
dominance/recessiveness - CORRECT ANSWER - in a pair of unit factors; one unit is
dominant, the other recessive
segregation - CORRECT ANSWER - paired unit factors segregate (separate)
independently during gamete formation
independent assortment - CORRECT ANSWER - -traits assort independently during
gamete formation
-all possible gamete combinations form with equal frequency
dominant trait - CORRECT ANSWER - trait that is phenotypically expressed in
heterozygotes
recessive trait - CORRECT ANSWER - trait that is phenotypically expressed ONLY in
homozygotes
genotype - CORRECT ANSWER - -genetic makeup of individual
-organism inherits two alleles, one from each parents
, -alleles written in pairs (DD, Dd, dd)
phenotype - CORRECT ANSWER - physical expression of a trait, how it looked in
Mendel's time
gene - CORRECT ANSWER - unit of inheritance
allele - CORRECT ANSWER - alternative form/version of a single gene
monohybrid - CORRECT ANSWER - crosses looking at one single trait across two
generations
dihybrid - CORRECT ANSWER - -looking at inheritance of two traits in one cross
-generates F2 generation
P1 - CORRECT ANSWER - original parents
F1 - CORRECT ANSWER - offspring of P1
F2 - CORRECT ANSWER - offspring of F1 generation crosses (grandkids of parental)
test cross - CORRECT ANSWER - -Determines if individual displaying dominant
phenotype is homozygous or heterozygous for that trait
-cross between dominant phenotype and homozygous recessive.
-If all offspring of the cross exhibit dominant phenotype, then dominant parent was homozygous
dominant.
-If half of offspring show dominant and half show recessive phenotype then the dominant parent
was heterozygous.
