any of the forms of a gene that can occupy the same locus
Methylation also plays an important role in genomic imprinting, which occurs when both maternal and paternal alleles are present but only one allele is expressed while the other remains inactive.
Today we know that a single gene consists of a unique sequence of DNA that provides the complete instructions to make a functional product, called a protein.
the basic structural and functional unit of all organisms
Genes instruct each cell type- such as skin, brain, and liver-to make discrete sets of proteins at just the right times, and it is through this specificity that unique organisms arise.
Created on 一月 13, 2010
Sign up now (it’s free!)
Whether you’re a teacher or a learner 一分钟极速历史开奖直播,
gold-punch.com can put you or your class
on the path to systematic vocabulary improvement.