Principles Of Inheritance

Principles of inheritance Inheritance is defined as the process in which genetic material is passed from parents to offspring. We have diploid chromosomes (23 sets of chromosomes), but gametes ( also known as egg and sperm) have one set of chromosomes, thus called as haploid. We contain one copy of genetic material (chromosomes) from each […]

Structure Of A Chromosome

Structure of a chromosome: Chemically, chromosomes are nucleoproteins containing about 40% DNA, 1-10% RNA, 40-50% basic proteins or histones, and about 10% non histone proteins. The chromosome is most studied at the metaphase stage; it is also the one that is best known regarding its structure. It is constituted by two chromatids, which are parallel […]

What is DNA methylation?

DNA Methylation  DNA methylation is transfer of methyl group from SAM to Adenine or Cytosine. Therefore, this addition takes place on two DNA bases which are at Adenine and Cytosine. DNA methylation is known as covalent modification which means it does not change sequence of DNA but affects the gene activity. Thus is done by […]

Palindromic Sequence

Palindromic Sequence A palindromic sequence is defined as the a sequence on double stranded DNA/RNA which is the same when read from 5′ to 3′ on one strand and 5′ to 3′ on the other or complementary strand. Example of complementary strand: If one strand has the sequence 5′ ATTGCCC 3′ then the complementary strand […]