Back cross, Biology

BACK CROSS

When F1 individual (Tt) is crossed with one of the two parents, either tall (TT) or dwarf (tt), such a cross is called the back cross. There are two possibilities in such a cross : -

(i)         When F1 (Tt) is crossed with the dominant homozygous (TT) parent, the plants produce will be 100% tall.

(ii)         If F1 (Tt) is crossed with recessive homozygous (tt), 50% plants will be tall and 50% dwarf.

Uses of a Back Cross

Back crosses are used by plant breeders to rapidly improve a variety by making a useful trait (gene) homozygous, that is pure.

Posted Date: 10/10/2012 4:00:46 AM | Location : United States







Related Discussions:- Back cross, Assignment Help, Ask Question on Back cross, Get Answer, Expert's Help, Back cross Discussions

Write discussion on Back cross
Your posts are moderated
Related Questions
How is snow - blindness caused in humans? a) Mention the site where syngamy happens in amphibians and reptiles correspondingly.

Characteristics of Ammonium Transport System The following are the characteristics of ammonium transport system: Ammonium transport system is ammonia' repressible

Why is the cerebellum more developed in mammals that jump or fly? The cerebellum is the major brain structure that coordinates the movement and the equilibrium of the body. For

i need help with to do a pedigree charts.

At the beginning of the process in an animal cell, the partition of the centriole takes place, which has been duplicated during Interphase but were in the same centrosome. Bipol

Q. What is the criterion used to classify hosts as intermediate hosts or as definitive hosts? The criterion used to categorize hosts as intermediate hosts or as definitive host

Define Briefly the Enzymatic Proteins? The most varied and very highly specialized proteins are those along with catalytic activity - the enzymes. Virtually all the chemical re

Foot-rot Foot-rot is a term applied to the condition of feet of cattle, sheep, goats and sometimes pigs. It is characterized by inflammation, necrosis and ulceration of underly

State one benefit of including vegetable fibre (roughage) in the diet   Vegetable fibre retains water (keeping the faeces soft and bulky), stops constipation, decreases the

Which of the two forms of respiration (aerobic and anaerobic) gives more energy from a given quantity of food? Aerobic respiration gives more energy than anaerobic respiration