Genetics & Breeding Flashcards
Haploid & diploid?
Haploid & diploid?
.Haploid - ovum and sperm come together in fertilization forming a diploid.
.Diploid - sperm & ovum at fertilisation results in a zygote with the normal diploid number of chromosomes.
Mitosis & meiosis?
Mitosis & meiosis?
.Mitosis - division of somatic cells
.Meiosis - the production of gametes (ovum & sperm)
DNA molecule?
DNA molecule?
.Consists of a double helix made of up two complementary chains of nucleotides composed of phosphoric acid, deoxyribose and four nitrogenous bases.
Genotype?
Genotype?
.The genetic makeup of an animal.
Phenotype?
Phenotype?
.The outward appearance of an animal
Genes?
Genes?
.Are molecules within cell neclei that control the development, structure, function and maintenance of living organisms.
.Involved in cell division and in manufacturing antibodies, cancers and some immune disorders have a genetic basis.
DNA?
DNA?
.Stores the information
.Is found in a thread like mass known as chromatin
Histones?
Histones?
.Are alkaline proteins found in the cell nuclei which package DNA into structural units called nucleosomes.
Chromatin?
Chromatin?
.Shortens and coils into rod-like bodies, forming chromosomes.
Mammals?
Mammals?
.Two X chromosomes in females and one X & Y in males.
Cell cycle phases?
Cell cycle phases?
.Interphase, mitosis and cytokinesis for somatic cells.
Meiosis?
Meiosis?
.During meiosis the chromosome complement is halved
Cat chromosomes?
Cat chromosomes?
.19 haploid
.38 diploid
Dog chromosomes?
Dog chromosomes?
.39 haploid
.78 diploid
Proteins?
Proteins are?
.Are the working component of the cell.
.Contain 20 different organic compounds (amino acids).
RNA?
RNA?
.Carries out instructions encoded in DNA and synthesises the proteins involved in cellular function.
Epigenetic?
Epigenetic?
.Around cells
Chromosomal defects?
Chromosomal defects?
.Result in still birth and miscarry