BIOD 210 GENETICS Exam MODULE 2 Questions and Ansẉers update

BIOD 210 GENETICS
Exam MODULE 2 Questions and
Ansẉers
2026\2027 update



1. Q: What is Mendel's First Law?
ANSWER The Law of Segregation.


2. Q: What does the Law of Segregation state?
ANSWER During gamete formation, the two alleles for a gene
separate so that each gamete receives only one allele.


3. Q: What is Mendel's Second Law?
ANSWER The Law of Independent Assortment.


4. Q: What does the Law of Independent Assortment state?
ANSWER Alleles of different genes assort independently of one
another during gamete formation.


5. Q: What is a monohybrid cross?
ANSWER A genetic cross between two individuals that differ in a
single trait.

, 6. Q: What is a dihybrid cross?
ANSWER A genetic cross between two individuals that differ in two
traits.


7. Q: What is a Punnett square?
ANSWER A diagram used to predict the genotypes of a particular
cross or breeding experiment.


8. Q: In a monohybrid cross between two heterozygotes (Aa x Aa),
what is the phenotypic ratio?
ANSWER 3:1.


9. Q: In a monohybrid cross between two heterozygotes (Aa x Aa),
what is the genotypic ratio?
ANSWER 1:2:1 (1 AA, 2 Aa, 1 aa).


10. Q: In a dihybrid cross between two double heterozygotes (AaBb
x AaBb), what is the phenotypic ratio?
ANSWER 9:3:3:1.


11. Q: What is a testcross?
ANSWER A cross between an organism with a dominant phenotype
(but unknown genotype) and a homozygous recessive individual to
determine the unknown genotype.


12. Q: What is true-breeding?