C. If 75 % of the puppies have a mask, the character is dominant. D. If 100 % of the puppies have a mask, the character is recessive. 15. [1 mark] Which is a characteristic of the pairs of sister chromatids that are visible during meiosis? A. They result from the replication of DNA before meiosis. B. They are only present in meiosis I. C. They split apart during metaphase I in meiosis. D. They are only present in meiosis II. 16. [1 mark] What distinguishes an allele from a gene? A. An allele is made of RNA. B. An allele is shorter. C. An allele is a variety of a gene. D. An allele cannot be transferred during genetic modification. 17. [1 mark] The fungus Rhytisma grows on the leaves of certain trees, causing a yellow leaf area in which chlorophyll is no longer present. A black, tar-like stain later spreads out. What happens in the leaf when Rhytisma is present? I. An increase in the intake of carbon dioxide II. A reduction in the production of oxygen III. An increase in the loss of water A. I only B. II only C. II and III only
C. If 75 % of the puppies have a mask, the character is dominant. D. If 100 % of the puppies have a mask, the character is recessive. 15. [1 mark] Which is a characteristic of the pairs of sister chromatids that are visible during meiosis? A. They result from the replication of DNA before meiosis. B. They are only present in meiosis I. C. They split apart during metaphase I in meiosis. D. They are only present in meiosis II. 16. [1 mark] What distinguishes an allele from a gene? A. An allele is made of RNA. B. An allele is shorter. C. An allele is a variety of a gene. D. An allele cannot be transferred during genetic modification. 17. [1 mark] The fungus Rhytisma grows on the leaves of certain trees, causing a yellow leaf area in which chlorophyll is no longer present. A black, tar-like stain later spreads out. What happens in the leaf when Rhytisma is present? I. An increase in the intake of carbon dioxide II. A reduction in the production of oxygen III. An increase in the loss of water A. I only B. II only C. II and III only
paper_1_may_2017.docx