BIOD 210 (Biology) EXAM QUESTIONS
AND ANSWERS RATED A.
The term _____________ is used to describe the physical manifestation of
any trait
Verified Answer -phenotype
In the second generation of a heterozygous monohybrid cross, what
percentage of the offspring have the dominant phenotype? recessive?
Verified Answer -75%, 25%
the ratio is 3:1
Define gene
Verified Answer -a gene is defined as a unit of heredity that is transferred
from a parent to offspring and is held to determine some characteristic of
the offspring
_________ are simply variations of a given gene
Verified Answer -Alleles
Explain Mendel's 9:3:3:1 dihybrid ratio
Verified Answer -If F1 generation of a dihybrid cross is crossed, it will
result in the 9:3:3:1 ratio of offspring
The ___________________________________ in genetics states that "the
probability of two or more independent events occurring simultaneously is
equal to the product of their individual probabilities
Verified Answer -product law of probabilities
, often 3/4 * 1/4 in some frequency
in ___________________________, a single phenotype is affected by
more than a single gene
Verified Answer -gene interaction
In the case of a _________________, the mutation in a gene results in a
total loss of the gene's function
Verified Answer -null allele
The phenomenon of an intermediate phenotype of the parental strains is
known as ________________
give an example of this
Verified Answer -incomplete or partial dominance
a white flower + red flower creating pink flower offspring
Incomplete dominance ratio
Verified Answer -1:2:1
in example, one red, two pink, one white
What enzyme is lacking activity in Tay Sachs disease?
Verified Answer -Hexosaminidase A
In ______________________, only a minimum of gene product is needed
to meet a normal phenotypic expression.
AND ANSWERS RATED A.
The term _____________ is used to describe the physical manifestation of
any trait
Verified Answer -phenotype
In the second generation of a heterozygous monohybrid cross, what
percentage of the offspring have the dominant phenotype? recessive?
Verified Answer -75%, 25%
the ratio is 3:1
Define gene
Verified Answer -a gene is defined as a unit of heredity that is transferred
from a parent to offspring and is held to determine some characteristic of
the offspring
_________ are simply variations of a given gene
Verified Answer -Alleles
Explain Mendel's 9:3:3:1 dihybrid ratio
Verified Answer -If F1 generation of a dihybrid cross is crossed, it will
result in the 9:3:3:1 ratio of offspring
The ___________________________________ in genetics states that "the
probability of two or more independent events occurring simultaneously is
equal to the product of their individual probabilities
Verified Answer -product law of probabilities
, often 3/4 * 1/4 in some frequency
in ___________________________, a single phenotype is affected by
more than a single gene
Verified Answer -gene interaction
In the case of a _________________, the mutation in a gene results in a
total loss of the gene's function
Verified Answer -null allele
The phenomenon of an intermediate phenotype of the parental strains is
known as ________________
give an example of this
Verified Answer -incomplete or partial dominance
a white flower + red flower creating pink flower offspring
Incomplete dominance ratio
Verified Answer -1:2:1
in example, one red, two pink, one white
What enzyme is lacking activity in Tay Sachs disease?
Verified Answer -Hexosaminidase A
In ______________________, only a minimum of gene product is needed
to meet a normal phenotypic expression.
