[生物] campbell習題

[superego (superego)]

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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※ 發信站: 批踢踢實業坊(ptt.cc) 
◆ From: 123.195.20.185
推 ru0320011:同源染色體分開已經是單套,B型的1圈10.5個bps
→ ru0320011:剩下的看課本自己算ˇˇ
→ neveror:30*10^(-6)/3.4*10(-10)   B型DNA的鹼基距3.4埃
→ neveror:應該是這樣吧~
推 pcboy0831:Meiosis I ==> separation of homologous pairs
→ pcboy0831:producing two haploid cells ...