Part 2 Flashcards
Genetic endowment that an individual inherits
Genotype
Observable or measurable characteristics
Phenotype
Sperm penetrates an ovum, forming a zygote
Conception
Single cell formed at conception
Zygote
Stretches of DNA
Genes
Can duplicate itself
DNA
Cell duplicates it’s chromosomes and divides into 2 genetically identical daughter cells
Mitosis
Germ cell divides, producing gametes (sperm/ova) that each contain half of the parent cells
Meiosis
Creating new hereditary combinations
Crossing over
Each pair of chromosomes segregates independently during meiosis
Independent assortment
23rd pair
Sex
Powerful gene that is expressed phenotypically and masks less powerful gene
Dominant Allele
2 heterozygous but equally powerful alleles produce a phenotype in which both genes are fully and equally expressed
Codominance
Also called as Trisomy 21
Down Syndrome
Needle is inserted through the abdominal wall into uterus
Amniocentesis