ANFS101 Lecture Notes - Lecture 7: Animal Breeding, Seminiferous Tubule, Gametogenesis
16 May 2016
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Document Summary
Genetics and animal breeding: the study of heredity, the transmission of traits from mated animals to their progeny, genotype- genetic makeup, expression of genotype=phenotype a. i. Chromosomes: rod like structures in the nucleus, paired, composed of dna strands. Genes: sequences of dna along chromosomes, locus-position, allele-specific form. Dna and rna: dna is composed of repeating nucleotide molecules, nucleotide=deoxyribose + phosphate + a base (a, t, c, g, a gene is specific linear sequence of dna nucleotides. Dna replication: unzip double strand of dna, form complementary mrna by the process of transcription. Translation: mrna leaves the nucleus to take information to the ribosomes which translate the genetic code, manufactures a chain of amino acids from the information found in the specific dna sequence of a gene. Inheritance: homologous chromosomes, genes affect the same trait, alleles: form of a gene which affects same trait, matching alleles at a given locus-homozygous, different alleles-heterozygous, inheritance: the way the alleles are passed on.
