a structure that looks like a very small piece of string and that exists, usually as one of a pair, in the central part of all living cells. Chromosomes contain genes. 染色體
[T]biologyto combine one breed of animal with another, or to mix one type of plant with another, in order to produce an animal or plant that is genetically different from both parents使(動植物)雜交
sciencea very small part of a cell, used in genetic engineering for carrying genetic material from one cell to another 載體(用於基因工程中,指細胞的一小部分,能將基因材料從一個細胞運送到另一個細胞)
a type of chromosome (=genetic material in a cell) that decides what sex a human or animal will be. In humans, females have two X-chromosomes and males have one. (細胞中能決定人或動物性别的)X染色體