Back cross, Biology

Assignment Help:

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.


Related Discussions:- Back cross

Define tuberculosis, Define tuberculosis Tuberculosis (TB) is still a p...

Define tuberculosis Tuberculosis (TB) is still a problem in the United States, even though the incidence continues to decline in most of the country. Treatment of TB can be div

Use of echocardiography in pericardial diseases, Q. Use of echocardiography...

Q. Use of echocardiography in pericardial diseases? One of the earliest clinical applications of echocardiography was in the detection of pericardial effusion and it remains th

Define essential parts of photocolorimeter - sample cuvettes, Define Essent...

Define Essential Parts of Photocolorimeter - Sample Cuvettes? For accurate and precise reading, cuvette must be transparent, clean, devoid of any scratches and there should be

Codon, Codon is the group of three consecutive nucleotides within the mess...

Codon is the group of three consecutive nucleotides within the messenger RNA (mRNA) which encodes a message to initiate translation, to incorporate the specific amino acid into th

Illustrate sequential phases of the cell cycle, Q. How does the quantity of...

Q. How does the quantity of genetic material differ within the cell during the sequential phases of the cell cycle? The first period of the first phase interphase of the cell c

Bacterial cells, which intracellular organelles are present in bacteria?

which intracellular organelles are present in bacteria?

Diseases of poultry, DISEASES OF POULTRY - Poultry birds suffer from a ...

DISEASES OF POULTRY - Poultry birds suffer from a variety of diseases - Nutritional            -          Rickets Viral                    -          Ranikhet Bact -

How many computers can access the ebook on, I usually study in the library ...

I usually study in the library on the schools computers so I will be accessing the eBook from many different computers throughout the semester. Is there a limit to how many compute

Sterility in angiosperms, Sterility in Angiosperms Sterility in angios...

Sterility in Angiosperms Sterility in angiosperms may arise due to several causes. Either the anther may not be formed, or anthers are formed but meiosis may be abnormal. A

Indications for coronary artery bypass surgery, Indications for Coronary Ar...

Indications for Coronary Artery Bypass Surgery :  The modalities of treatment for coronary artery disease iuc: (1) medical, (2) angioplasty and stenting, and (3) coronary arte

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd