What is trisomics? Describe with example howl trisomic are helpful in finding the location of a gene
Answers
Answer: TRISOMIC - A condition in which available extra copy of a chromosome is already present in cell nuclei.
Trisomics are generally divided into five types
1. Primary Trisomic - In this type of trisomic contain extra chromosome that us normal and completely homologous to one pair of chromosome complement.
2. Secondary Trisomic -In this extra chromosome is an iso- chromosome, the secondary trisomic is called an aneuploid . And it's formula is 2n + iso.
3. Telocentric Trisomic - An individual called also normal chromosome is called telocentric trisomic and generally it's formula is 2n + t.
4. Tertiary Trisomic - A cell individually carried a translocated extra chromosome called tertiary trisomic.
5. Compensating Trisomic - It is a compensating trisomic contains two tertiary ( translocated ) chromosome.
Answer:
To answer the first part of the question, a trisomy can be defined as a type f polysomy. This includes three instances of a particular chromosome rather than of the normal two.
In simple words its an abnormal number of chromosomes.
Explanation:
In the case of using its help to locate a gene, If suitable trisomic stocks are available, this relationship can be used to determine which chromosome bears the locus under investigation when looking at the genes.