What ratios typically result from crosses with single genetic locus? скачать в хорошем качестве

What ratios typically result from crosses with single genetic locus?

Genetics is a complex field with lots of details to keep straight. But when you get a handle on some key terms and concepts, including the structure of DNA and the laws of inheritance, you can start putting the pieces together for a better understanding of genetics. The Scientific Language of Genetics From chromosomes to DNA to dominant and recessive alleles, learning the language of genetics is equivalent to learning the subject itself. The following key terms are guaranteed to appear frequently in your study of all things genetic: Alleles: Alternative versions of a gene Autosomal chromosome: A non-sex chromosome Chromosome: A linear or circular strand composed of DNA that contains genes Diploid: An organism with two copies of each chromosome DNA: Deoxyribonucleic acid; the molecule that carries genetic information Dominant: An allele or phenotype that completely masks a recessive allele or phenotype Gene: The fundamental unit of heredity; a specific section of DNA within a chromosome that codes for a specific protein Genotype: The genetic makeup of an individual; the allele(s) possessed at a given locus Heterozygote: An individual with two different alleles of a given gene or locus Homozygote: An individual with two identical alleles of a given gene or locus Locus: A specific location on a chromosome Phenotype: The physical characteristics of an individual Recessive: An allele or phenotype that is masked by a dominant allele or phenotype; recessive traits are exhibited only when an individual has two recessive alleles at the same locus or gene