PSYB64H3 Study Guide - Sonic Hedgehog, X-Inactivation, Radial Glial Cell
9 Aug 2013
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Different phenotypic traits result from the interaction between alternative forms of a gene called alleles there are three different alleles for blood type a, b and o giving rise to four blood types. At a given site if someone has two identical alleles, individual will be considered homozygous for genes. Non-typically you could have genes that are imprinted where only one allele is expressed and its identity depends on the parent that supplied the allele. these genes have been implicated in number of genetic, behavioural and cancer disorders. 4 nucleic acids, atgc. codons are group of 3 bases. Each codon contains instruction for synthesis of 20 proteins. Proteome also contribute to this complexity, which is the set of proteins encoded and expressed by genome. Meiosis is the process through which egg and sperm are formed and divided. During this process, parental chromosome pairs are divided in half, leaving only one chromosome from each pair in egg or sperm cell.
