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1、桃果实表面光滑对有毛为显性,现对毛桃的雌蕊表面授以纯合光桃的花粉,该雌蕊发育成的果实为( ) A、 光桃 B、 毛桃 C、 光桃概率为1/3

1、桃果实表面光滑对有毛为显性,现对毛桃的雌蕊表面授以纯合光桃的花粉,该雌蕊发育成的果实为( ) A、 光桃 B、 毛桃 C、 光桃概率为1/3 D、 毛桃概率为1/3 2、 ( ♀)AABB ×(♂)aabb 两棵植株杂交,问种皮、胚、胚乳的基因组成。. B. 种皮: AABB 胚: AaBb 胚乳: AAaBBb.

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1、桃果实表面光滑对有毛为显性,现对毛桃的雌蕊表面授以纯合光桃的花粉,该雌蕊发育成的果实为( ) A、 光桃 B、 毛桃 C、 光桃概率为1/3

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  1. 1、桃果实表面光滑对有毛为显性,现对毛桃的雌蕊表面授以纯合光桃的花粉,该雌蕊发育成的果实为( ) A、光桃 B、毛桃 C、光桃概率为1/3 D、毛桃概率为1/3 2、 (♀)AABB ×(♂)aabb两棵植株杂交,问种皮、胚、胚乳的基因组成。 B 种皮:AABB 胚:AaBb 胚乳:AAaBBb

  2. 3、已知豌豆种皮灰色(G)对白色(g)为显性,子叶黄色(Y)对绿色(y)为显性。以白色种皮绿子叶的豌豆做母本,灰色种皮黄子叶作为父本,若母本所结子粒的表现型为白种皮黄子叶、白种皮绿子叶,则父本的基因型为( ) A、GGYy或GgYy B、 GgYy C、GgYY或GgYy D、 GgYY A

  3. 4、已知豌豆种皮灰色(G)对白色(g)为显性,子叶黄色(Y)对绿色(y)为显性,如基因型为ggyy的豌豆与基因型为GGYY的豌豆杂交得F1,F1自交得到F2,则F2植株上所结种子种皮颜色的分离比和子叶颜色的分离比分别是( ) A、3:1和5:3 B、9:3:3:1和3:1 C、5:3和9:3:3:1 D、3:1和3:1 A

  4. 5、已知豌豆种皮灰色(G)对白色(g)为显性,子叶黄色(Y)对绿色(y)为显性。每对性状的杂合子(F1)自交后代(F2)均表现3:1的性状分离比。以上种皮颜色的分离比和子叶颜色的分离比分别来自以下哪代植株群体所结种子的统计。( ) A、F1植株和F1植株 B、 F2植株和F2植株 C、 F1植株和F2植株 D、F2植株和F1植株 D

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