BIO 200 Lecture 5 Exam Questions
with Complete Answers
what is a trait? - ANSWER-a specific characteristic such as seed color or plant
height
The actual phenotype for a specific characte
hybrids - ANSWER-offspring of crosses between parents with different traits
offspring that result from crosses between parents with different traits
6. cross one true breeding plant with one true breeding plant for another version of
the trait
The importance of quantification of results - ANSWER-c. counted the offspring for
each cross of each trait
d. this quantification of results distinguished his work for those of other hybridization
scientists
e. mendals mathematical analysis allowed him to see that the traits appeared in
predictable ratios across generation
f. queued him into how heredity works
monohybrid crosses - ANSWER-a. different in only one trait
Cross, or mating, between organisms that involves only one pair of contrasting traits
p generation - ANSWER-i. Parents
ii. Cross to make hybrids= cross fertilize
Parental generation, the first two individuals that mate in a genetic cross
cross fertilization - ANSWER-the fusion of sperm and egg derived from two different
individuals
F1, F2, etc., generation - ANSWER-F1) Products of cross called F1 generation
d. Filial generation
F2) e. Second cross in a mono hybrid cross design is a among the F1s = self cross
f. Pollen used to fertilize flower it come from
g. F2 filial 2 gernation
i. 3:1 ratio of purple flowers to white
self-crossing - ANSWER-a mono hybrid cross design is a among the F1s
Monohybrid ratios - ANSWER-i. 3:1 ratio of purple flowers to white
latent traits - ANSWER-present but unseen
recessive traits in heterozygote
, The meaning of the five element model--what conclusions does Mendel draw form
each of his elements? - ANSWER-a. Parents transmit info about traits to offspring
(factors) (genes)
b. Each individual receives 2 copies of each factor to encode one trait
i. One copy on a chromosome from each parent
ii. Come on separate chromosome
iii. From each gamete
c. Not all the factors are the same
i. There are alternatives forms of genes (alleles)
ii. If the two are alleles are identical they are homozygous
iii. If different they are heterozygous
d. The two factors do not blend
i. When the adult has offspring the alleles will segregrate ramonly for offspring
The presence of a factor does not guarantee it will be expressed it can be latent
(dominant and recessive)
ii. In heteroxygous only only allele is expressed (dominant)
iii. Other is recessive
14. Flowing flower color
a. Purple is dominant
b. P genrations do not breed true
c. P gernation flowers are NOT homozygous
d. Parents must have recessive alleles to pass down
e. Heterozygous could express dominant or recessive trait depending on the allele
match up from parents
Factors/genes - ANSWER-a. Parents transmit info about traits to offspring (factors)
(genes)
b. Each individual receives 2 copies of each factor to encode one trait
i. One copy on a chromosome from each parent
ii. Come on separate chromosome
iii. From each gamete
Allele - ANSWER-Alternative forms of a gene for each variation of a trait of an
organism.
Homozygote/homozygous - ANSWER-the two are alleles are identical they are
homozygous
Heterozygote/Heterozygous - ANSWER-if the alleles are different they are
heterozygous
Dominant - ANSWER-In a pair of alleles, the one that is masked if a dominant allele
is present (represented with uppercase letters)
14. Flowing flower color
a. Purple is dominant
Recessive - ANSWER-An allele that is masked when a dominant allele is present
Describes a trait that is covered over, or dominated, by another form of that trait and
seems to disappear.
with Complete Answers
what is a trait? - ANSWER-a specific characteristic such as seed color or plant
height
The actual phenotype for a specific characte
hybrids - ANSWER-offspring of crosses between parents with different traits
offspring that result from crosses between parents with different traits
6. cross one true breeding plant with one true breeding plant for another version of
the trait
The importance of quantification of results - ANSWER-c. counted the offspring for
each cross of each trait
d. this quantification of results distinguished his work for those of other hybridization
scientists
e. mendals mathematical analysis allowed him to see that the traits appeared in
predictable ratios across generation
f. queued him into how heredity works
monohybrid crosses - ANSWER-a. different in only one trait
Cross, or mating, between organisms that involves only one pair of contrasting traits
p generation - ANSWER-i. Parents
ii. Cross to make hybrids= cross fertilize
Parental generation, the first two individuals that mate in a genetic cross
cross fertilization - ANSWER-the fusion of sperm and egg derived from two different
individuals
F1, F2, etc., generation - ANSWER-F1) Products of cross called F1 generation
d. Filial generation
F2) e. Second cross in a mono hybrid cross design is a among the F1s = self cross
f. Pollen used to fertilize flower it come from
g. F2 filial 2 gernation
i. 3:1 ratio of purple flowers to white
self-crossing - ANSWER-a mono hybrid cross design is a among the F1s
Monohybrid ratios - ANSWER-i. 3:1 ratio of purple flowers to white
latent traits - ANSWER-present but unseen
recessive traits in heterozygote
, The meaning of the five element model--what conclusions does Mendel draw form
each of his elements? - ANSWER-a. Parents transmit info about traits to offspring
(factors) (genes)
b. Each individual receives 2 copies of each factor to encode one trait
i. One copy on a chromosome from each parent
ii. Come on separate chromosome
iii. From each gamete
c. Not all the factors are the same
i. There are alternatives forms of genes (alleles)
ii. If the two are alleles are identical they are homozygous
iii. If different they are heterozygous
d. The two factors do not blend
i. When the adult has offspring the alleles will segregrate ramonly for offspring
The presence of a factor does not guarantee it will be expressed it can be latent
(dominant and recessive)
ii. In heteroxygous only only allele is expressed (dominant)
iii. Other is recessive
14. Flowing flower color
a. Purple is dominant
b. P genrations do not breed true
c. P gernation flowers are NOT homozygous
d. Parents must have recessive alleles to pass down
e. Heterozygous could express dominant or recessive trait depending on the allele
match up from parents
Factors/genes - ANSWER-a. Parents transmit info about traits to offspring (factors)
(genes)
b. Each individual receives 2 copies of each factor to encode one trait
i. One copy on a chromosome from each parent
ii. Come on separate chromosome
iii. From each gamete
Allele - ANSWER-Alternative forms of a gene for each variation of a trait of an
organism.
Homozygote/homozygous - ANSWER-the two are alleles are identical they are
homozygous
Heterozygote/Heterozygous - ANSWER-if the alleles are different they are
heterozygous
Dominant - ANSWER-In a pair of alleles, the one that is masked if a dominant allele
is present (represented with uppercase letters)
14. Flowing flower color
a. Purple is dominant
Recessive - ANSWER-An allele that is masked when a dominant allele is present
Describes a trait that is covered over, or dominated, by another form of that trait and
seems to disappear.
