MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Calculation of Phenotypic and Genotypic Ratios

Pure tall pla...

Question

Pure tall plants are crossed with pure dwarf plants. In the F $_{1}$ generation all plants were tall. These tall plants of F $_{1}$ generation were selfed and the ratio of tall to dwarf plants obtained was 3: 1. The phenomenon observed is

A

Dominance

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

B

Inheritance

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

Co-dominance

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

Heredity

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A Dominance
According to Mendel's law of dominance, the tall character is dominant in this case. Thus, the character will express when it is homozygous as well as heterozygous. Even if a single allele of the gene is present, it will express for the phenotype.

Suggest Corrections

thumbs-up

0

Similar questions

Q. A cross was made between tall and dwarf plants. In

F_{1}

plants were selfed, the tall and dwarf plants appeared in 3:1 ratio in

F_{2}

generation. This phenomenon is known as

Q. Pure-bred tall pea plants are first crossed with pure-bred dwarf pea plants. The pea plants obtained in F₁ generation are then cross-bred to produce F₂ generation of pea plants.
(a) What do the plants of F₁ generation look like?
(b) What is the ratio of tall plants to dwarf plants in F₂ generation?
(c) Which type of plants were missing in F₁ generation but reappeared in F₂ generation?

In one of his experiments with pea plants, Mendel observed that when a pure tall pea plant is crossed with a pure dwarf pea plant, in the first generation

F_{1}

only tall plants appear.

F_{1}

generation plants were self-fertilized, he observed that in the plants of second-generation

F_{2}

both tall plants and dwarf plants were present. Why did it happen? Explain briefly.
(ii)What happens to the traits of the dwarf plants in this case?

Q. When Mendel crossed a Tall plant with a dwarf plant, no medium height plants were obtained in

F_{1}

generation. Why?

The phenotype of $F_{1}$ progeny, when pure tall and dwarf plants are crossed together is _________.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Mendel's Experiments

BIOLOGY

Watch in App

explore_more_icon

Explore more

Calculation of Phenotypic and Genotypic Ratios

Standard XII Biology

Join BYJU'S Learning Program

CrossIcon