Brooks BioPrinciples Final Exam 4
UPDATED ACTUAL Exam Questions and
CORRECT Answers
"Blending Inheritance" Theory - CORRECT ANSWER - Inherited traits are mixed
"blended" together. If you had 2 different colors of pink that the offspring would be an
intermediate of the original 2. suggest things become more similar.
Gregor Mendel - CORRECT ANSWER - Discovery of basic genetic inheritance rules
through breeding of pea plants. Experiments show there were factors (genes) responsible for
inheritance of phenotype. Found 7 important characteristic.
Mendels First Law "Segregation of alternate factors" and Mono hybrid Crosses - CORRECT
ANSWER - with certain traits there were individual plants which if only crossed with
other plants just like them would almost always produce the exact same phenotype (true-
breeders, Homozygous, P1.)
Monohyrbrid cross
(P Generation) - CORRECT ANSWER - Bread a pure Purple (PP) plant with a pure White
(pp) plant (P1). These are homozygous true breeders.
Monohybrid cross
(F1 genertion) - CORRECT ANSWER - Only showed 1 dominant trait (purple flowers).
Purple flowers are hybrids. (Pp)
P gen traits didnt blend.
Monohybrid cross
(F2 generation) - CORRECT ANSWER - F1 hybrids are crossed, thier offspring 3/4 were
dominant purple color (PP, Pp). 1/4th expressed the (P generation) white color (pp).
Monohybrid Phenotypic ratio - CORRECT ANSWER - 3:1
, Monohybrid Genotypic ratio - CORRECT ANSWER - 1:2:1
Factors - CORRECT ANSWER - genes separated during gametogenesis.
Genes - CORRECT ANSWER - specific sequence of nucleotides in DNA that is involved
in producing a polypeptide (responsible for trait).
Alleles - CORRECT ANSWER - alternate versions of genes A/a or B/b, which account for
variation in characteristics (brown vs blue hair). there are only 2 possible alleles.
Loci - CORRECT ANSWER - the location of a given genes along the length of a a certain
chromosome
Genotype - CORRECT ANSWER - The genetic code of an organism that codes for
proteins that are responsible for the phenotype (PP, Pp, pp.)
Phenotype - CORRECT ANSWER - the physical or physiological traits of an organism.
Dominant trait/alleles - CORRECT ANSWER - Variation of a gene the mask the recessive.
AA and Aa genotypes both show the same phenotype, Capital A. Only need one dominant allele.
Recessive traits/Alleles - CORRECT ANSWER - Variations of a gene that produce
phenotype only when there are two copies. lowercase aa genotype creates recessive phenotype.
Homozygous - CORRECT ANSWER - A Genotype which has identical alleles at the same
locus (PP, pp). Haploid gametes are identical.
heterozygous - CORRECT ANSWER - A genotype which has 2 different alleles at the
same locus (Pp). Haploid gametes with be different.
UPDATED ACTUAL Exam Questions and
CORRECT Answers
"Blending Inheritance" Theory - CORRECT ANSWER - Inherited traits are mixed
"blended" together. If you had 2 different colors of pink that the offspring would be an
intermediate of the original 2. suggest things become more similar.
Gregor Mendel - CORRECT ANSWER - Discovery of basic genetic inheritance rules
through breeding of pea plants. Experiments show there were factors (genes) responsible for
inheritance of phenotype. Found 7 important characteristic.
Mendels First Law "Segregation of alternate factors" and Mono hybrid Crosses - CORRECT
ANSWER - with certain traits there were individual plants which if only crossed with
other plants just like them would almost always produce the exact same phenotype (true-
breeders, Homozygous, P1.)
Monohyrbrid cross
(P Generation) - CORRECT ANSWER - Bread a pure Purple (PP) plant with a pure White
(pp) plant (P1). These are homozygous true breeders.
Monohybrid cross
(F1 genertion) - CORRECT ANSWER - Only showed 1 dominant trait (purple flowers).
Purple flowers are hybrids. (Pp)
P gen traits didnt blend.
Monohybrid cross
(F2 generation) - CORRECT ANSWER - F1 hybrids are crossed, thier offspring 3/4 were
dominant purple color (PP, Pp). 1/4th expressed the (P generation) white color (pp).
Monohybrid Phenotypic ratio - CORRECT ANSWER - 3:1
, Monohybrid Genotypic ratio - CORRECT ANSWER - 1:2:1
Factors - CORRECT ANSWER - genes separated during gametogenesis.
Genes - CORRECT ANSWER - specific sequence of nucleotides in DNA that is involved
in producing a polypeptide (responsible for trait).
Alleles - CORRECT ANSWER - alternate versions of genes A/a or B/b, which account for
variation in characteristics (brown vs blue hair). there are only 2 possible alleles.
Loci - CORRECT ANSWER - the location of a given genes along the length of a a certain
chromosome
Genotype - CORRECT ANSWER - The genetic code of an organism that codes for
proteins that are responsible for the phenotype (PP, Pp, pp.)
Phenotype - CORRECT ANSWER - the physical or physiological traits of an organism.
Dominant trait/alleles - CORRECT ANSWER - Variation of a gene the mask the recessive.
AA and Aa genotypes both show the same phenotype, Capital A. Only need one dominant allele.
Recessive traits/Alleles - CORRECT ANSWER - Variations of a gene that produce
phenotype only when there are two copies. lowercase aa genotype creates recessive phenotype.
Homozygous - CORRECT ANSWER - A Genotype which has identical alleles at the same
locus (PP, pp). Haploid gametes are identical.
heterozygous - CORRECT ANSWER - A genotype which has 2 different alleles at the
same locus (Pp). Haploid gametes with be different.
