B When a tall plant has ^the genes Tt, it is called: ^A) Pure Tall B) Hybrid ^ ^B If both genes are the same ^for a trait, the organism is ^heterozygous for the trait. ^A) True B) False ^B In rabbits, black is dominant ^over white. If 1/2 of a lit- ^ter is white, the parent cross^is: A) Bb x Bb B) Bb x bb ^B It refers to the _____ of ^an organism. ^A) Phenotype B) Genotype ^ ^A When part of a chromosome ^switches places with its homo-^logous chromosome, this is: ^A)Crossing Over B)Gene Linkage^A Someone with type O blood can ^receive blood only from a type^O donor. A) True B) False ^ ^A Because colorblindness ^appears more in men than ^women, it is: ^A) Sex-linked B) Dominant ^B _____ is the failure of ^homologous chromosomes to ^segregate during meiosis. ^A)Inversion B) Non-dysjunction^A Down's Syndrome is the ^result of an extra 21st ^chromosome. ^A) True B) False ^B Which is the opposite of ^inbreeding? ^A) Cloning B) Hybridization ^ ^
