
The Punnett square below shows a cross between a pure tall and heterozygous tall plant. What is the total number of tall offspring represented in the Punnett square?
T- tall plant
t- short plant
Gametes T T T TT TT t Tt Tt
A. None are short
B. 25% are short
C. 50% are short
D. 75% are short
Gametes | T | T |
T | TT | TT |
t | Tt | Tt |
Answer
500.7k+ views
1 likes
Hint: The offsprings produced would be either heterozygous dominant or homozygous dominant.
Complete answer: A pure tall plant has the genotype TT and the heterozygous tall plant has the Tt genotype.
We know that, T is dominant and t is recessive. It means ‘T’ allele (tall) dominates over ‘t’ (short).
Cross is shown between a pure tall (TT) and heterozygous tall plant (Tt) would produce:
Hence, the phenotypic ratio of TT : Tt = 1 : 1
The phenotype shows that TT & Tt both are tall plants and there are no short plants.
So, the correct answer is A. None are short
Note: The above cross is a monohybrid cross. A monohybrid cross is the one which takes place between two individuals with different alleles of a single genetic locus.
Complete answer: A pure tall plant has the genotype TT and the heterozygous tall plant has the Tt genotype.
We know that, T is dominant and t is recessive. It means ‘T’ allele (tall) dominates over ‘t’ (short).
Cross is shown between a pure tall (TT) and heterozygous tall plant (Tt) would produce:
Gametes | T | T |
T | TT(tall) | TT(tall) |
t | Tt(tall) | Tt(tall) |
Hence, the phenotypic ratio of TT : Tt = 1 : 1
The phenotype shows that TT & Tt both are tall plants and there are no short plants.
So, the correct answer is A. None are short
Note: The above cross is a monohybrid cross. A monohybrid cross is the one which takes place between two individuals with different alleles of a single genetic locus.
Latest Vedantu courses for you
Grade 11 Science PCM | CBSE | SCHOOL | English
CBSE (2025-26)
School Full course for CBSE students
₹41,848 per year
Recently Updated Pages
Master Class 11 Economics: Engaging Questions & Answers for Success

Master Class 11 Business Studies: Engaging Questions & Answers for Success

Master Class 11 Accountancy: Engaging Questions & Answers for Success

Master Class 11 English: Engaging Questions & Answers for Success

Master Class 11 Computer Science: Engaging Questions & Answers for Success

Master Class 11 Maths: Engaging Questions & Answers for Success

Trending doubts
State and prove Bernoullis theorem class 11 physics CBSE

What are Quantum numbers Explain the quantum number class 11 chemistry CBSE

Write the differences between monocot plants and dicot class 11 biology CBSE

1 ton equals to A 100 kg B 1000 kg C 10 kg D 10000 class 11 physics CBSE

State the laws of reflection of light

One Metric ton is equal to kg A 10000 B 1000 C 100 class 11 physics CBSE
