生物 高校生 4年以上前

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Test II PROBLEM SOLVING Directions: Answer the question and show your complete solution in the separate paper. 1. Suppose the cells lining of your cheeks can completely di vide every 24 hours. Assuming no cells die in the process, how many cheek cells will be there after 7 days if you started with 5 cheek cells? 2. If an organism has 15 pairs of homologous chromosomes, how many chromosomes will each daughter cell have after telophase of mitosis? Test I. Complete the concept in mitosis has the Cell division Purpose of which have occurs in through (10. condeneed which Includes or noncondensed which include 5。 温 a loop of DNA which Includes (in order) which form sister 9. during 12. (13. 14. which is followed by 15. which Is followed by (16. which includes (in order). 17. 19. >(20. What's New In meiosis the cell goes through similar stages in mitosis and uses similar strategies to organize and separate chromosomes. However, the cell has a more complex task in meiosis. It still needs to separate sister chromatids (the two halves of a duplicated chromosome), as in mitosis. But it must also separate homologous chromosomes, the similar but non-identical chromosome pairs an organism receives from its two parents. These goals are accomplished in meiosis using a two-step division process. Homologue pairs separate during a first round of cell division, called meiosis I. Sister chromatids separate during a second round, called meiosis III. Since cell division occurs twice during meiosis, one starting cell can produce four gametes (eggs or sperm). In each round of division, cells go through four stages: prophase, metaphase, anaphase, and telophase. Stages of Meiosis I In meiosis I, homologous chromosomes are separated into two cells such that there is one chromosome (consisting of

生物 高校生 4年以上前

(3)の②でどうして組換えが起こる場合なのにアイキクが含まれているのですか？

円U )k カd 基本例題4 配偶子形成と遺伝子の組み合わせ 遺伝子型が①AABBDD と② aabbdd の個体を両親として交配を行い, 雑種第 一代(F,)を得た。次の各問いに答えよ。 ただし, 遺伝子 Aと B, aとbは同じ染 色体にあり、D, dは, A, aやB, bとは異なる染色体にある。 (1) ①と②の個体が ア オ カ キ エ つくる配偶子の AH 染色体と遺伝子 の関係を示した は合べものを右図から それぞれ選べ。 (2) F, の体細胞の染色体と遺伝子の関係を示したものを上図から選べ。 (3) 次の場合,F, がつくる配偶子として考えられるものを上図からすべて選べ。 の 遺伝子の組換えが起こらない場合 2 遺伝子A-B間で組換えが起こる場合 A a BB BH ケ サ Ae pARa ADAAD A d BB0 b PAHG 99g 指針 配偶子に含まれる染色体数は,減数分裂によって体細胞の半分になる。 解答(1) 0 ア② ク (2) ケ (3) 0 ア, イ, キ, ク ② ア, イ, ウ, エ, オ, カ, キ, ク 殖 213 第5章●生

生物 高校生 約6年前

空いてるところは枠の中のどれになるのでしょうか？ ちなみに空いてるのは、cell membraneとlysosomeです。

Rbosome Labelthe Plant Cell echondn Gola ん 内 fdzpkmiz FRcfculum Vocab Box: (12) Ribosome _ | GolgiApparatus Cell Membrane Nucleus Nucleolus Lcellwal Cytoplasm Lysosome Mitochondria Endoplasmic Reticulum | Amyloplast Vacuole =