ANSC 340 QUIZZES 1-10 EXAM
QUESTIONS AND ANSWERS (VERIFIED
AND UPDATED)
Which to mechanisms both contribute to genetic diversity - ANS meisosis
crossing over
You have decided to spend money to have all of your potential breeders tested for the presence
of a lethal allele. You then breed only those who tested negative. This is an example of: -
ANS marker assisted selection
The mating of an individual with a dominant phenotype to one that is a known homozygous
recessive id termed as: - ANS testcross
______ mating is the mating amongst generation - ANS inter se
_____ is the mating of an F1 to an individual from one of the pure breeding strains used to
create the F1 - ANS backcross
phenotype ratio you would expect from a dihybrid cross - ANS 9:3:3:2
are mammalian gametic cells diploid - ANS no, haploid
@2026/2027 ALLRIGHTS RESERVED.
, a missense mutation is one that codes for a premature stop - ANS false, non-sense
What is the simplest (3 word) explanation of Mendel's Law of Segregation - ANS alleles sort
randomly
genes on sex chromosomes are referred to as - ANS sex-linked
in the horse, the mare is the homogametic sex - ANS true
in the chicken, the hen is the homogametic sex - ANS false
(male)
The failure of chromosomes to separate properly during meiosis is known as: -
ANS nondisjunction
In humans, this is a relatively common example of the phenomenon described in the previous
question: - ANS down syndrome
Calico coloring in a male cat is extremely rare. What must occur (in terms of the cat's genotype)
for a male cat to be calico? - ANS -nondisjunction at the sex chromosome and presence of
the spotted allele must occur
In the case of codominance and two alleles, how many distinct phenotypes are there? -
ANS 3
scrotal rupture in pigs, a situation where the phenotype is not always expressed, is an example
of - ANS incomplete penetrance
a ____ probability probability is the probability of two or more events occurring together -
ANS joint
@2026/2027 ALLRIGHTS RESERVED.
QUESTIONS AND ANSWERS (VERIFIED
AND UPDATED)
Which to mechanisms both contribute to genetic diversity - ANS meisosis
crossing over
You have decided to spend money to have all of your potential breeders tested for the presence
of a lethal allele. You then breed only those who tested negative. This is an example of: -
ANS marker assisted selection
The mating of an individual with a dominant phenotype to one that is a known homozygous
recessive id termed as: - ANS testcross
______ mating is the mating amongst generation - ANS inter se
_____ is the mating of an F1 to an individual from one of the pure breeding strains used to
create the F1 - ANS backcross
phenotype ratio you would expect from a dihybrid cross - ANS 9:3:3:2
are mammalian gametic cells diploid - ANS no, haploid
@2026/2027 ALLRIGHTS RESERVED.
, a missense mutation is one that codes for a premature stop - ANS false, non-sense
What is the simplest (3 word) explanation of Mendel's Law of Segregation - ANS alleles sort
randomly
genes on sex chromosomes are referred to as - ANS sex-linked
in the horse, the mare is the homogametic sex - ANS true
in the chicken, the hen is the homogametic sex - ANS false
(male)
The failure of chromosomes to separate properly during meiosis is known as: -
ANS nondisjunction
In humans, this is a relatively common example of the phenomenon described in the previous
question: - ANS down syndrome
Calico coloring in a male cat is extremely rare. What must occur (in terms of the cat's genotype)
for a male cat to be calico? - ANS -nondisjunction at the sex chromosome and presence of
the spotted allele must occur
In the case of codominance and two alleles, how many distinct phenotypes are there? -
ANS 3
scrotal rupture in pigs, a situation where the phenotype is not always expressed, is an example
of - ANS incomplete penetrance
a ____ probability probability is the probability of two or more events occurring together -
ANS joint
@2026/2027 ALLRIGHTS RESERVED.
