【简答题】The proteins that bind to DNA to form eukaryotic chromosomes are traditionally divided into two general classes: the _______ and the nonhistone chromosomal proteins.
【判断题】Two different forms of genes on the same locus of a pair of homologous chromosomes are called alleles.
【单选题】关于广播信道,以下哪一项描述是错误的。
B.
可以用两条广播信道实现三个以上终端之间的全双工通信
【单选题】The sperm-separation technique is based on the fact that the chromosomes responsible for babies' sex ______.
A.
are of different shapes
B.
are of different sizes