作者superego (superego)
看板TransBioChem
標題[生物] campbell習題
時間Wed Dec 24 11:25:49 2008
細胞遺傳學
1.At the end of telophase I of meiosisi and first cytokinesis ,
there are ________
(A)four haploid cells (B)two diploid cells
(C)four diploid cells (D)one haploid ovum and three polar bodies
(E)two haploid cells
ans(E)
Why?減數分裂末期一，答案不是應該是B嗎?希望好心人士相救，謝謝
DNA複製
2若一段DNA長度約30um，此DNA屬B型DNA，試問此段DNA含有多少bps?
ANS 88235bps
請問有人知道怎麼計算嘛?感激不盡
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1F：推 ru0320011:同源染色體分開已經是單套,B型的1圈10.5個bps 12/24 23:29
2F：→ ru0320011:剩下的看課本自己算ˇˇ 12/24 23:29
3F：→ neveror:30*10^(-6)/3.4*10(-10) B型DNA的鹼基距3.4埃 01/01 00:14
4F：→ neveror:應該是這樣吧~ 01/01 00:15
5F：推 pcboy0831:Meiosis I ==> separation of homologous pairs 01/05 00:51
6F：→ pcboy0831:producing two haploid cells ... 01/05 00:51