BIO1201/ BIO 1201 Exam 3: (New 2025/ 2026 Update) | Review with Questions and Verified Answers| 100% Correct| A Grade – LSU

BIO1201/ BIO 1201 Exam 3: (New 2025/
2026 Update) | Review with Questions and
Verified Answers| 100% Correct| A Grade –
LSU

QUESTION
do genes located near each other on the same chromosome tend to be inherited together?


Answer:
yes



QUESTION
occurs when phenotypes of the heterozygote and dominant homozygote are identical


Answer:
complete dominance



QUESTION
the phenotype of F1 hybrids is somewhere between the phenotypes of the two parental varieties


Answer:
incomplete dominance



QUESTION
two dominant alleles affect the phenotype in separate, distinguishable ways


Answer:
codominance

,QUESTION
when one gene has multiple phenotypic effects


Answer:
pleiotropy



QUESTION
what hereditary diseases are caused by pleiotropic alleles


Answer:
cystic fibrosis and sickle-cell disease



QUESTION
when expression of a gene at one locus alters the phenotypic expression of a gene at a second
locus


Answer:
epistasis



QUESTION
when multiple genes independently affect a single trait


Answer:
polygenic inheritance



QUESTION
example of epistasis


Answer:
labrador retriever coat color: one gene determines the pigment color and the other gene
determines if the pigment is deposited in the hair
k k k k k k k k

, QUESTION
example of polygenic inheritance
k k k




Answer:
over 180 genes affect height
k k k k




QUESTION
heterozygous individuals who carry the recessive allele but are phenotypically normal
k k k k k k k k k k




Answer:
carriers



QUESTION
recessive disorders show up only in individuals
k k k k k k k




Answer:
homozygous for the allele k k k




QUESTION
example of recessive disorder
k k k




Answer:
albinism



QUESTION
example of dominant disorder
k k k




Answer:
achondroplasia (dwarfism) k