MyQuestionIcon

19

You visited us 19 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