BIO340 Exam 2 Latest Update
Questions & Answers with Rationales| 100%
Correct | Grade.
1. You buy two sets of flowers from the R and W are codominant
same species, one set is only made of
red flowers, while the other is made of
white flowers, and you know both sets
were produced by only red and white
parents, respectively. Assume flower
color is coded by a single autosomal
gene. After crossing red flowers with
white flowers, all the offspring are
banded red and white. What can you
say about the alleles R and W of the
flower color gene?
2. Your friend gets tested and the results 0
are conclusive: she will not develop
Huntington's disease. What is the
probability of her child having the
, disease now?
3. Recessive mutations The phenotype of a recessive
mutation is seen only in
homozygous individuals.
4. Fully Dominant Mutations The phenotype of a fully
dominant mutation is seen in
both heterozygous and
homozygous individuals.
5. Loss-of-function mutations cause a gene to lose some or
all of its normal function
6. hypomorphic, null Types of mutations
7. hypomorphic mutations mutations that have lost only
some of their function.
8. Null mutations mutations that have lost all of
their function
9. haplosufficient where a a single copy is
sufficient to produce the wild-
type phenotype in the
heterozygous genotype
10. haploinsufficient a single copy is not sufficient to
produce the wild-type
phenotype in the heterozygous
genotype
, 11. gain-of-function in which the gene product
acquires a new function or
express increased wild type
activity
12. codominance both alleles for the same
characteristic are
simultaneously expressed in
the heterozygote
13. incomplete dominance one of the alleles appears in
the phenotype in the
heterozygote, but not to the
exclusion of the other, which
can also be seen
14. Incomplete dominance. If black and white true-breeding
mice are mated and the result
is all gray offspring, what
inheritance pattern would this
be indicative of?
15. Multiple alleles and codominance. ABO blood groups are an
example of:
16. Yes, if each parent carries one i allele. Could an individual with blood
type O (genotype ii) be a
legitimate child of parents in
Questions & Answers with Rationales| 100%
Correct | Grade.
1. You buy two sets of flowers from the R and W are codominant
same species, one set is only made of
red flowers, while the other is made of
white flowers, and you know both sets
were produced by only red and white
parents, respectively. Assume flower
color is coded by a single autosomal
gene. After crossing red flowers with
white flowers, all the offspring are
banded red and white. What can you
say about the alleles R and W of the
flower color gene?
2. Your friend gets tested and the results 0
are conclusive: she will not develop
Huntington's disease. What is the
probability of her child having the
, disease now?
3. Recessive mutations The phenotype of a recessive
mutation is seen only in
homozygous individuals.
4. Fully Dominant Mutations The phenotype of a fully
dominant mutation is seen in
both heterozygous and
homozygous individuals.
5. Loss-of-function mutations cause a gene to lose some or
all of its normal function
6. hypomorphic, null Types of mutations
7. hypomorphic mutations mutations that have lost only
some of their function.
8. Null mutations mutations that have lost all of
their function
9. haplosufficient where a a single copy is
sufficient to produce the wild-
type phenotype in the
heterozygous genotype
10. haploinsufficient a single copy is not sufficient to
produce the wild-type
phenotype in the heterozygous
genotype
, 11. gain-of-function in which the gene product
acquires a new function or
express increased wild type
activity
12. codominance both alleles for the same
characteristic are
simultaneously expressed in
the heterozygote
13. incomplete dominance one of the alleles appears in
the phenotype in the
heterozygote, but not to the
exclusion of the other, which
can also be seen
14. Incomplete dominance. If black and white true-breeding
mice are mated and the result
is all gray offspring, what
inheritance pattern would this
be indicative of?
15. Multiple alleles and codominance. ABO blood groups are an
example of:
16. Yes, if each parent carries one i allele. Could an individual with blood
type O (genotype ii) be a
legitimate child of parents in
