第 1 題
1 分In asexual reproduction, how many parents are involved and what is the nature of the resulting offspring?
AQA GCSE · Biology 8461
Reproduction：練習題
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第 2 題
1 分A woman is undergoing In Vitro Fertilisation (IVF) treatment. Which of the following best describes the hormonal stimulation phase and the subsequent stage of the process?
第 3 題
1 分Malarial parasites have a complex life cycle involving both sexual and asexual reproduction. Which statement correctly describes where these different types of reproduction occur?
第 4 題
1 分Which of the following is the best definition of a genome?
第 5 題
1 分In DNA structure, which components form the "backbone" of the long strands?
第 6 題
5 分Cystic fibrosis is an inherited disorder that affects cell membranes. It is caused by a recessive allele, f.
a) A woman is a carrier for cystic fibrosis, and her partner is homozygous dominant. Complete a Punnett square to show the possible genotypes of their children. Use F for the dominant allele and f for the recessive allele.
b) State the probability that a child born to this couple will have cystic fibrosis. Give your answer as a percentage.
c) Polydactyly is another inherited disorder where a person has extra fingers or toes. Explain why a child only needs to inherit one copy of the polydactyly allele to express the phenotype, whereas they need two copies for cystic fibrosis.
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