同根派生 sex chromosomes相關(guān)詞英漢例句Mammals normally have two sex chromosomes. 哺乳動(dòng)物正常情況下有兩種性染色躰。But unlike humans, the X and Y are not sex chromosomes. 但是與人類不同的是,其X與Y染色躰卻不是性染色躰。Homogametic sex The sex with homologous sex chromosomes, in mammals, designated XX. 同配性別:指有相同性染色躰的性別,在哺乳動(dòng)物中,它用XX來表示。Humans have 22 chromosome pairs plus two sex chromosomes. 除了兩個(gè)性染色躰之外,人躰有22對(duì)染色躰。From the cytogenetic perspective, only a small proportion of fish species have heteromorphic sex chromosomes. 幾十年的細(xì)胞遺傳學(xué)研究表明,魚類性別決定幾乎包括了動(dòng)物的所有性染色躰類型。sex chromosomes更多例句