in a dihybrid cross between two heterozygous plants (TtRr x TtRr) where T is tall, t is wrinkled seed, what is the probability of obtaining an offspring that is tall with wrinkled seeds?

Pdav80119

4 months ago

Step 1: Separate the traits
Since height and seed shape are independent, we can consider each trait separately.
Height (Tt x Tt)
Punnett square:

T
t
T
TT
Tt
t
Tt
tt
Probability of tall (T_) = TT or Tt
p(tall) = 3/4
Seed shape (Rr x Rr)
Punnett square:

R
r
R
RR
Rr
r
Rr
rr
Probability of wrinkled (rr) = only rr
p(wrinkled) = 1/4
Step 2: Multiply probabilities
Since the traits are independent:
p(tall) * p(wrinkled) = 3/4*1/4 =3/16
answer is 3/16

ada94917

2 hours ago

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