BIO340 Exam 2 | ACTUAL EXAM 2025 LATEST UPDATED | COMPLETE
QUESTIONS WITH 100% RATED CORRECT ANSWERS | GET IT A+
You buy two sets of flowers from the 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? - (answers)R and W are codominant
Your friend gets tested and the results are conclusive: she will not develop Huntington's disease.
What is the probability of her child having the disease now? - (answers)0
Recessive mutations - (answers)The phenotype of a recessive mutation is seen only in
homozygous individuals.
Fully Dominant Mutations - (answers)The phenotype of a fully dominant mutation is seen in
both heterozygous and homozygous individuals.
Loss-of-function mutations - (answers)cause a gene to lose some or all of its normal function
hypomorphic, null - (answers)Types of mutations
hypomorphic mutations - (answers)mutations that have lost only some of their function.
Null mutations - (answers)mutations that have lost all of their function
haplosufficient - (answers)where a a single copy is sufficient to produce the wild-type phenotype
in the heterozygous genotype
haploinsufficient - (answers)a single copy is not sufficient to produce the wild-type phenotype in
the heterozygous genotype
, gain-of-function - (answers)in which the gene product acquires a new function or express
increased wild type activity
codominance - (answers)both alleles for the same characteristic are simultaneously expressed in
the heterozygote
incomplete dominance - (answers)one of the alleles appears in the phenotype in the heterozygote,
but not to the exclusion of the other, which can also be seen
Incomplete dominance. - (answers)If black and white true-breeding mice are mated and the result
is all gray offspring, what inheritance pattern would this be indicative of?
Multiple alleles and codominance. - (answers)ABO blood groups are an example of:
Yes, if each parent carries one i allele. - (answers)Could an individual with blood type O
(genotype ii) be a legitimate child of parents in which one parent had blood type A and the other
parent had blood type B?
Incomplete dominance - (answers)A white splashed (Bl/Bl) Andalausian chicken and a black
(bl/bl) Andalusian chicken are crossed. The heterozygotes produced show an intermediate
phenotype (blue). What inheritance pattern would this be indicative of?
codominance - (answers)A person with only one Sickle Cell Anemia allele and one unaffected
allele will have some normal red blood cells and some abnormal. What inheritance pattern would
this be indicative of?
complementation tests - (answers)to determine if any of the mutations are in a single gene, or if
each mutation represents one of the several genes necessary for a phenotype to be expressed
complementary gene interaction - (answers)Gene interaction occurs when two or more genes
affect the same phenotype, by influencing a common pathway, if two genes do interact, there are
fewer phenotypes than in the offspring of a typical dihybrid cross
QUESTIONS WITH 100% RATED CORRECT ANSWERS | GET IT A+
You buy two sets of flowers from the 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? - (answers)R and W are codominant
Your friend gets tested and the results are conclusive: she will not develop Huntington's disease.
What is the probability of her child having the disease now? - (answers)0
Recessive mutations - (answers)The phenotype of a recessive mutation is seen only in
homozygous individuals.
Fully Dominant Mutations - (answers)The phenotype of a fully dominant mutation is seen in
both heterozygous and homozygous individuals.
Loss-of-function mutations - (answers)cause a gene to lose some or all of its normal function
hypomorphic, null - (answers)Types of mutations
hypomorphic mutations - (answers)mutations that have lost only some of their function.
Null mutations - (answers)mutations that have lost all of their function
haplosufficient - (answers)where a a single copy is sufficient to produce the wild-type phenotype
in the heterozygous genotype
haploinsufficient - (answers)a single copy is not sufficient to produce the wild-type phenotype in
the heterozygous genotype
, gain-of-function - (answers)in which the gene product acquires a new function or express
increased wild type activity
codominance - (answers)both alleles for the same characteristic are simultaneously expressed in
the heterozygote
incomplete dominance - (answers)one of the alleles appears in the phenotype in the heterozygote,
but not to the exclusion of the other, which can also be seen
Incomplete dominance. - (answers)If black and white true-breeding mice are mated and the result
is all gray offspring, what inheritance pattern would this be indicative of?
Multiple alleles and codominance. - (answers)ABO blood groups are an example of:
Yes, if each parent carries one i allele. - (answers)Could an individual with blood type O
(genotype ii) be a legitimate child of parents in which one parent had blood type A and the other
parent had blood type B?
Incomplete dominance - (answers)A white splashed (Bl/Bl) Andalausian chicken and a black
(bl/bl) Andalusian chicken are crossed. The heterozygotes produced show an intermediate
phenotype (blue). What inheritance pattern would this be indicative of?
codominance - (answers)A person with only one Sickle Cell Anemia allele and one unaffected
allele will have some normal red blood cells and some abnormal. What inheritance pattern would
this be indicative of?
complementation tests - (answers)to determine if any of the mutations are in a single gene, or if
each mutation represents one of the several genes necessary for a phenotype to be expressed
complementary gene interaction - (answers)Gene interaction occurs when two or more genes
affect the same phenotype, by influencing a common pathway, if two genes do interact, there are
fewer phenotypes than in the offspring of a typical dihybrid cross
