17.5) Monohybrid inheritance Allele: is a version of a gene. Genotype: is the genetic makeup of an organism in terms of the alleles present. Phenotype: is the observable features of an organism. Homozygous: is having two identical alleles of a particular gene....
17.2) Chromosomes, genes and proteins Chromosome is a thread of DNA, made up of a string of genes. Genes is a length of DNA that codes for a protein. Allele is a version of a gene. A human body (somatic) cell nucleus contains 23 pairs of chromosomes....
17.1) Inheritance Inheritance is the transmission of genetic information from generation to generation. The Inheritance of such characteristics is called heredity and the branch of biology that studies how heredity works is called genetics.
17.3) Mitosis Mitosis: is nuclear division giving rise to genetically identical cells. Cells have a finite life: they wear out or become damaged, so they need to be replaced constantly. The processes of growth, repair and replacement of cells all rely on...
17.4) Meiosis Meiosis: is nuclear division, which gives rise to cells that are genetically different. Meiosis takes place in the gonads of animals (eg. the testes and ovaries of mammals) The cells formed are gametes (sperm and egg cells in mammals). Gametes are...