3. E. EVALUATING LEARNING
E. EVALUATING LEARNING
E. EVALUATING LEARNING
_________ 1. In a monohybrid cross between
two heterozygous individuals (Rr x Rr),
what is the expected genotypic ratio of
the offspring?
A) 1:1
B) 1:2:1
C) 3:1
D) 9:3:3:1
4. E. EVALUATING LEARNING
E. EVALUATING LEARNING
E. EVALUATING LEARNING
_________2. What is the phenotype of an
organism with the genotype AaBb?
A) Homozygous dominant
B) Homozygous recessive
C) Heterozygous
D) None of the above
5. E. EVALUATING LEARNING
E. EVALUATING LEARNING
E. EVALUATING LEARNING
_________3. In a dihybrid cross between two
individuals heterozygous for both traits
(RrYy x
RrYy), what is the expected phenotypic
ratio of the offspring?
A) 9:3:3:1
B) 3:1
C) 1:2:1
D) 1:1
6. E. EVALUATING LEARNING
E. EVALUATING LEARNING
E. EVALUATING LEARNING
_________4. If a trait is controlled by a single gene
with two alleles, and one allele is completely
dominant over the other, what will be the
phenotype of a heterozygous individual?
A) Same as the homozygous dominant
individual
B) Same as the homozygous recessive
individual
C) A blend of both dominant and recessive
traits
D) None of the above
7. E. EVALUATING LEARNING
E. EVALUATING LEARNING
E. EVALUATING LEARNING
_________5. What is the genotype of an
individual with the phenotype of a
recessive trait?
A) Homozygous dominant
B) Homozygous recessive
C) Heterozygous
D) Cannot be determined
8. E. EVALUATING LEARNING
E. EVALUATING LEARNING
E. EVALUATING LEARNING
_________6. If a pea plant with yellow seeds
(YY) is crossed with a pea plant with
green seeds
(yy), what will be the genotype of the F1
generation?
A) YY
B) Yy
C) yy
D) Both YY and Yy
9. E. EVALUATING LEARNING
E. EVALUATING LEARNING
E. EVALUATING LEARNING
_________7. In a monohybrid cross between
two heterozygous individuals (Ss x Ss),
what is
the probability of producing a
homozygous recessive offspring?
A) 1/4
B) 1/2
C) 1/3
D) 1/8
10. E. EVALUATING LEARNING
E. EVALUATING LEARNING
E. EVALUATING LEARNING
_________8. In a dihybrid cross between two
individuals heterozygous for both traits
(RrYy x
RrYy), what is the probability of
producing an offspring with the genotype
rrYY?
A) 1/16
B) 1/8
C) 1/4
D) 1/2
11. E. EVALUATING LEARNING
E. EVALUATING LEARNING
E. EVALUATING LEARNING
_________9. If a trait is controlled by a
single gene with two alleles, and both
alleles are
expressed equally in the heterozygous
condition, what kind of inheritance
pattern
does it exhibit?
A) Incomplete dominance
B) Codominance
C) Multiple alleles
12. E. EVALUATING LEARNING
E. EVALUATING LEARNING
E. EVALUATING LEARNING
_________10. What is the expected
genotypic ratio of the offspring in a
dihybrid cross between
two individuals heterozygous for both
traits (RrYy x RrYy)?
A) 1:2:1
B) 1:1:1:1
C) 9:3:3:1
D) 3:1
13. E. EVALUATING LEARNING
E. EVALUATING LEARNING
E. EVALUATING LEARNING
1. B) 1:2:1
2. C) Heterozygous
3. A) 9:3:3:1
4. A) Same as the homozygous dominant individual
5. B) Homozygous recessive
6. B) Yy
7. A) 1/4
8. A) 1/16
9. B) Codominance
10. C) 9:3:3:1
ANSWERS KEY
![Reference :
•SCIENCE 8 LESSON EXEMPLAR
● Pedigree ppt. (n.d.). [PowerPoint slides]. Retrieved from
https://www.duplinschools.net/cms
/lib/NC01001360/Centricity/Domain/758/PEDIGREE%20ppt..ppt
● Genetic Crosses Worksheet. (n.d.). [Worksheet]. Retrieved from
https://www.currituck.k12.nc.us/cms/lib/NC01001303/Centricity/
Domain/149/Genetic_Crosses_Worksheet.pdf](https://image.slidesharecdn.com/q1science8week4-day5-250724032356-a8ef9763/85/Q1_Science-8_Week4-Day-5-pptx-science-re-14-320.jpg)
