解答つき看護学校入学試験のための生物ワークシート

What is a trait that is controlled by many genes called?

1. AA codominant trait
2. BA recessive trait
3. CA polygenic trait
4. DA sex-linked trait

What is an allele?

1. AA protein made from a gene
2. BA section of DNA between genes
3. CA different version of the same gene
4. DA pair of matching chromosomes from each parent

What does xylem carry in a plant?

1. ASugars from the leaves to the roots
2. BOxygen from the leaves to the roots
3. CWater and minerals from the roots upward
4. DSeeds from the flowers to the soil

Why are G–C base pairs held together more strongly than A–T pairs?

1. AG–C pairs are joined by strong covalent bonds instead of hydrogen bonds
2. BG–C pairs form three hydrogen bonds, and A–T pairs form two
3. CG and C are both purines, so they fit more tightly
4. DA–T pairs are found only in RNA

What are introns?

1. ANon-coding sections removed from pre-mRNA before translation
2. BCodons that tell the ribosome to stop translation
3. CShort pieces of DNA made on the lagging strand
4. DCoding sections joined together to form the mature mRNA

細胞周期のどの時期にDNAが複製されるか。

1. A体細胞分裂の中期
2. B細胞質分裂の間
3. C減数第二分裂のときだけ
4. D間期のS期

Two parents are both AaBbCc, and the three genes assort independently. What is the probability that a child is aabbcc?

1. A3/64
2. B1/16
3. C1/64
4. D1/8

Two genes lie very close together on the same chromosome. In a test cross, most offspring look like the parents instead of the expected 1:1:1:1 ratio. Why?

1. ABoth genes show incomplete dominance
2. BA frameshift mutation happened in both genes
3. CThe genes are linked and are rarely separated by crossing over
4. DThe genes are on different chromosomes and assort independently