Name: ________________________________________________
SCORE:________
Grade/Section: _______
Teacher________________________
ACTIVITY 2: PEA’S BE with YOU
OBJECTIVE:
1. Describe how Mendel works on the garden peas.
2. Solve and predict Mendelian phenotypic and genotypic ratio (monohybrid cross).
DIRECTION: Based on the video about Mendelian Genetics:
I. Gregor Mendel’s Pea Plant Experiment: Arrange the flowchart according to the correct order\that led to the conceptualization
of the Mendelian Laws. Write 1st, 2nd, 3rd, 4th, & 5th.
II. Punnett Square: Supply the missing alleles in this Punnett Square for a single trait (Monohybrid Cross). Use uppercase letters to
represent the dominant allele and lowercase letters for the recessive allele.
3.
1.
2.
t
T
G
t
Tt
T
4.
G
A
G
a
5.
t
A
g
a
6.
Y
t
T
Y
t
y
R
Y
RR
RR
III. Fill in the Punnett square show the results of a monohybrid cross. Predict the genotypes and phenotypes, genotypic ratio (PR),
and phenotypic ratio (GR).
1. homozygous tall pea plant cross
2. Heterozygous yellow pea plant
with homozygous short pea plant
pea plant cross with heterozygous green seed pea plant
phenotype(s): _____
genotype(s):
genotype(s): _____
PR: _____
GR: _____
phenotype(s): _____
t
T
T
Y
t
PR: _____
GR: _____
Y
y
y
_____