学年

質問の種類

生物 高校生

⑴の問題で、検定交雑により生じた子だと各遺伝子が連鎖しているか判断できる理由がわかりません。検定交雑はなぜするのですか?

基本例題 4 遺伝子の独立と連鎖 リード 解説動画 ある植物がもつ3対の対立遺伝子 (A とa, B と b, C とc) について, 顕性ホモ接合の個体と潜性ホモ接合の個体を交配して, F, (雑種第1代) をつくっ た。 この F を検定交雑したところ, 表のような結果が得られた。 表現型 [ABC] [ABc] 分離比 7 2 [AbC] [Abc] [aBC] [aBc] [abC] [abc] 2 7 7 2 2 7 (1) 連鎖している遺伝子の組み合わせとして, 最も適当なものを次の(ア)~(ケ)のうち から1つ選べ。 AとBのみ (ア) A と B のみ (エ) α とものみ AABB C C (イ)AとCのみ (ウ)BとCのみ の親から生じ (オ) a とcのみ (カ b c のみ 第1章 生物の進化 2 ② a (キ) AとC, a とc (ク) AとB, aとb (ケ) B と C, b とc (2) 連鎖している遺伝子間の組換え価を, 小数第1位を四捨五入して答えよ。 指針 (1) F, は, 顕性ホモ接合の個体(AABBCC) を潜性ホモ接合の個体(aabbcc) と交配して 生じた子, つまり, 検定交雑により生じた子なので, F, の表現型の分離比から, 各遺伝子が連鎖しているかどうかを判断できる。 [AB]: [Ab]: [aB]: [ab]=9:9:9:9=1:1:1:1→AとB(aとb)は独立 [AC]: [Ac]: [aC]: [ac]=9:9:9:9=1:1:1:1 →AとC(a とc)は独立 [BC] [Bc] [bC] [bc] = 14:4:4:14 = 7:2:2:7B と C(b と c) は連鎖 組換えを起こした配偶子の数 (2) 組換え価(%) 全配偶子の数 = 22.22...(%) 解答 (1) ケ (2) 22% 4 +4 x 100 = x 100 14 + 4 + 4 + 14

未解決 回答数: 0
英語 高校生

marry の形がわかりません

12 1 cause (3) What did he ( 1 ask (4) The girl closely ( ①resembles (5) Could you ( I talk ) my dead mother. 2 resembles of ) me which one is his? 2 speak TRIAL 2 1》各文の( )に入る最も適切な語句を選び、番号を答えなさい。 ④forgive (1) We don't ( ) the students to have visitors in the dorm rooms after ten o'clock. 2 prevent allow (2) John's vast knowledge didn't ( 3 let ) him solve the problem. 2 save ) to you? Anything interesting? 2 say ④help 3 allow mudis blom ud ④tell 3 talk lew to easly s dal CEME (成蹊) (関西学院)) (学習院大) (2) You c (3) The feve 2 各文には (1) The d tree. 3 resembles to ④resembles with (4) I [101] (高千穂新大) tell (5) Ma 3 say (名古屋学院大) (6) We ( ) New York "the Big Apple." ④ call (6) E 3 speak 1 introduce 2 say [開催要 (金沢工業) 3 (7) Peter doesn't get ( 1 along ) well with his father. 2 forward 3 much ⑥to (東大) Hi I laid (城西大) 4 of lliw 5 sowi (8) After some hesitation, he () the book on the desk. 19mm) Em 2 lied dary lay mid (tog slote lain (9) We ( ) the matter for hours but came to no conclusion. 001\1800 1 spoke (10) He ( ①informed 2 discussed were ③3 discussed about 4 said ) his teacher of his success in the examination. bise boy ind 3 noticed molni) 'nb4 suggested gnise 2 reported (11) The poor old man was robbed (d) his money. for me to absood from? \bo al two o'c (中央大) 日本 (1) ted bis(**) 4 of (2 (南山大) married with 1 off (12) In the spring of 1985, Frank (109) Jennifer in a large church ceremony.b I married 2 married to hely 3 got married eloqa (13) A: Haven't you finished that report yet? B: ( badguel in bodigusi) siges ) me a few more minutes and I'll get it done. 2 Share 3 Take \ is srt of nateil of (センター試験) Wait 1 Give ☞(14) A college education will () you to get a broader view of the world. ad ei w(t>- 1 let (15) This computer cost ( 2 enable 3 make 4 take (京都産業大) ③ of me 4 for me her speech. (大阪産業大) A+ 3 with ④against ) my whole salary last month. 1 me 2 to me (16) Astonishment almost deprived the girl ( 2 at 1 of (17) The welfare office provides ①food with people in need 3 people in need with food (2) vast Hints! (14) broader 2 food people in need 4 people in need for food (8) hesitation (9) conclusion (16) astonishment (17) welfare ( 秋田県立大)

未解決 回答数: 1