Bio 100 Exam 2 Genetics & Evolution
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Johann Gregor Mendel - CORRECT ANSWER - Father of setting the framework for the
study of genetics through his experiments with 30,000 pea plants.
What is a true breeding pea plant? - CORRECT ANSWER - where a flower's petals reain
tightly sealed until pollination to prevent the pollination of other plants.
Hybridizations, what is it, and who performed them? - CORRECT ANSWER - Mendel
performed them, this involves mating 2 true breeding individuals that had different traits.
How did Mendel have the peas pollinate together?
a. manually transfers pollen from one pea plant to another
b. placing the plants closely together
c. placing the plants in a romantic honey moon suite. - CORRECT ANSWER - A.
manually transfers pollen from one pea plant to another
In mendel's crosses what did he call th e first generation plants, the 2nd gen, and the 3rd gen. -
CORRECT ANSWER - 1st generation was, the P or parental generation plants
2nd generation, the F1 or first filial generation
3rd generation were the F2 generation
*these were the most intriguing and became the basis of Mendel's postulates
What is a trait - CORRECT ANSWER - the variation in the physical appearance of a
heritable characteristic
ex. plant height, pea pod color, flower position, etc...
,Dominant vs. recessive trait - CORRECT ANSWER - the inherited unchanged in a
hybridization. Recessive traits are latent or disappear in the offspring of a hybridization... it does
reappear in the progeny of the hybrid offspring.
In regards to the fertilization of pea plants what is the correct order..??
A. meiosis-> inherited chromosomes/genes -> diploid cell
B. diploid cell->meiosis -> inherited chromosomes/genes
C. Inherited chromosomes/genes -> meiosis-> diploid cell - CORRECT ANSWER - C.
Inherited chromosomes/genes -> meiosis -> diploid cell
What are alleles what do they do to genes? - CORRECT ANSWER - Alleles cause gene
vairants that arise by mutation and exist at teh same relative locations on homologous
chromosomes
Phenotype vs. Genotype - CORRECT ANSWER - Phenotype, the observable traits
expressed by an organism. Genotype, an organisms underlying genetic makeup, consisting of
both the physically visible and the non-expressed alleles
What kind of genotypes are these in order??
YY, Yy, yy - CORRECT ANSWER - homozygous dominant, heterozygous, homozygous
recessive
CBQ: Alternate forms of a gene are called - CORRECT ANSWER - alleles
CBQ: Describing a person as having hemophilia is to indicate his or her___. - CORRECT
ANSWER - phenotype
CBQ: Why do your chromosomes come in pairs? - CORRECT ANSWER - Because one
member of each pair came from my mother and the other from my father.
, CBQ: How did Mendel get the peas to cross fertilize? - CORRECT ANSWER - He kept
them apart and pollinated them by hand
CBQ: the observable traits expressed by an organism are described as its ____. - CORRECT
ANSWER - phenotype
Incomplete dominance vs. codominance - CORRECT ANSWER - incomplete dominance
describes the situation in which the heterozygote exhibits a phenotype that is intermediate
between the homozygous phenotypes.
codominance, describes the simulatneous expression of both of the allele in the heterozygote.
What does x-linked mean? - CORRECT ANSWER - genes that are present on the C but
not the Y chromosome...such that males only inherit one allele for the gene and females inherit
two
CBQ: Half of the gametes produced by an organism with the genotype Aa will receive the A
allele, while half will receive the a allele. This is a demonstration of _________. - CORRECT
ANSWER - segregation
CBQ: Which of the following is true about genes that are located on diff. chromosomes? -
CORRECT ANSWER - The genes are inherited independently of each other.
CBQ:A recessive trait will be observed in individuals that are ____ for that trait. - CORRECT
ANSWER - Homozygous
CBQ: What are the types of gametes that can be produced by an individual w/the genotype
AaBb? - CORRECT ANSWER - AB,Ab,aB,ab
CBQ: If mom's genotype is Bb, her eggs will be ___. - CORRECT ANSWER - half B and
half b
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Johann Gregor Mendel - CORRECT ANSWER - Father of setting the framework for the
study of genetics through his experiments with 30,000 pea plants.
What is a true breeding pea plant? - CORRECT ANSWER - where a flower's petals reain
tightly sealed until pollination to prevent the pollination of other plants.
Hybridizations, what is it, and who performed them? - CORRECT ANSWER - Mendel
performed them, this involves mating 2 true breeding individuals that had different traits.
How did Mendel have the peas pollinate together?
a. manually transfers pollen from one pea plant to another
b. placing the plants closely together
c. placing the plants in a romantic honey moon suite. - CORRECT ANSWER - A.
manually transfers pollen from one pea plant to another
In mendel's crosses what did he call th e first generation plants, the 2nd gen, and the 3rd gen. -
CORRECT ANSWER - 1st generation was, the P or parental generation plants
2nd generation, the F1 or first filial generation
3rd generation were the F2 generation
*these were the most intriguing and became the basis of Mendel's postulates
What is a trait - CORRECT ANSWER - the variation in the physical appearance of a
heritable characteristic
ex. plant height, pea pod color, flower position, etc...
,Dominant vs. recessive trait - CORRECT ANSWER - the inherited unchanged in a
hybridization. Recessive traits are latent or disappear in the offspring of a hybridization... it does
reappear in the progeny of the hybrid offspring.
In regards to the fertilization of pea plants what is the correct order..??
A. meiosis-> inherited chromosomes/genes -> diploid cell
B. diploid cell->meiosis -> inherited chromosomes/genes
C. Inherited chromosomes/genes -> meiosis-> diploid cell - CORRECT ANSWER - C.
Inherited chromosomes/genes -> meiosis -> diploid cell
What are alleles what do they do to genes? - CORRECT ANSWER - Alleles cause gene
vairants that arise by mutation and exist at teh same relative locations on homologous
chromosomes
Phenotype vs. Genotype - CORRECT ANSWER - Phenotype, the observable traits
expressed by an organism. Genotype, an organisms underlying genetic makeup, consisting of
both the physically visible and the non-expressed alleles
What kind of genotypes are these in order??
YY, Yy, yy - CORRECT ANSWER - homozygous dominant, heterozygous, homozygous
recessive
CBQ: Alternate forms of a gene are called - CORRECT ANSWER - alleles
CBQ: Describing a person as having hemophilia is to indicate his or her___. - CORRECT
ANSWER - phenotype
CBQ: Why do your chromosomes come in pairs? - CORRECT ANSWER - Because one
member of each pair came from my mother and the other from my father.
, CBQ: How did Mendel get the peas to cross fertilize? - CORRECT ANSWER - He kept
them apart and pollinated them by hand
CBQ: the observable traits expressed by an organism are described as its ____. - CORRECT
ANSWER - phenotype
Incomplete dominance vs. codominance - CORRECT ANSWER - incomplete dominance
describes the situation in which the heterozygote exhibits a phenotype that is intermediate
between the homozygous phenotypes.
codominance, describes the simulatneous expression of both of the allele in the heterozygote.
What does x-linked mean? - CORRECT ANSWER - genes that are present on the C but
not the Y chromosome...such that males only inherit one allele for the gene and females inherit
two
CBQ: Half of the gametes produced by an organism with the genotype Aa will receive the A
allele, while half will receive the a allele. This is a demonstration of _________. - CORRECT
ANSWER - segregation
CBQ: Which of the following is true about genes that are located on diff. chromosomes? -
CORRECT ANSWER - The genes are inherited independently of each other.
CBQ:A recessive trait will be observed in individuals that are ____ for that trait. - CORRECT
ANSWER - Homozygous
CBQ: What are the types of gametes that can be produced by an individual w/the genotype
AaBb? - CORRECT ANSWER - AB,Ab,aB,ab
CBQ: If mom's genotype is Bb, her eggs will be ___. - CORRECT ANSWER - half B and
half b
