第三章单元测试
- If the green pea pod allele (G) is dominant to the yellow allele (g), a cross between two heterozygous plants would be expected to produce (如果绿色豌豆荚等位基因（G）对黄色等位基因（g）是显性的，那么两株杂合植株杂交，预计会产生)_____.（ ）
- If a mouse has a dominant phenotype (P-), how would you determine if it is homozygous (PP) or heterozygous (Pp)? (如果一只小鼠有显性的表型（P-），你如何判断它是纯合（PP）还是杂合（Pp）的)（ ）
- In a cross between two individuals BbGG Bbgg, what ratio of phenotypes would be expected in the offspring if the two genes show independent assortment ? (在两个个体 BbGG Bbgg 的杂交中，如果两个基因表现出独立分配，预计后代的表型比是多少)（ ）
- What is the probability that two parents who are heterozygous for the recessive trait of albinism will have two albino offspring? (父母双方都是白化病（隐性遗传）的杂合子，其后代中有两个白化病患者的概率是多少)（ ）
- How many different types of gametes can be formed by the genotype AaBbCc? (基因型 AaBbCc 可以形成多少种不同类型的配子)（ ）
A: 3/4 green and 1/4 yellow (3/4绿和1/4黄) B: 1/2 green and 1/2 yellow (1/2 绿色和 1/2 黄色) C: 1/4 green and 3/4 yellow(1/4 绿色和 3/4 黄色) D:all green(全绿)
答案: 3/4 green and 1/4 yellow (3/4绿和1/4黄)
A:Cross it to a homozygous dominant mouse.(与纯合显性小鼠杂交) B:Cross it to a heterozygous dominant mouse.(与杂合子显性小鼠杂交) C:Cross it to a mouse with the dominant trait but a similarly unknown genotype.(将它与具有显性性状但基因型同样未知的小鼠杂交) D:Cross it to a mouse with the recessive trait.(与隐性小鼠杂交)
A:1:2:1 B:2:1 C:3:1 D:9:3:3:1
A: 1/4 B: 1/2 C: 1/16 D: 1/8
A:3 B:16 C:4 D:8
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