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1.1Various options are provided as possible answers to the following questions. Choose the correct answer and write only the letter (A to D\ next to the question number (1.1.1 to 1.1. \n the ANSWER BOOK, for example
1.1.1Which ONE of the following represents the correct result of rtilisation in plants? Ovule becomes the fruit Ovum becomes the zygote Ovary becomes the seed Stigma enlarges to receive pollen grains
1.1A recessive allele always leads to genetic disorder is never expressed in t he phenotype is not expressed when in a genotype with a dominant allele produces the same phenotype when homozygous as when heterozygous
1.1Which ONE of the following correctly represents the sex chromosomes in a human male and the chromosome i n his sperm cell that contributes to forming male offspring Human male
1.1.4The particular position of a gene on a chromosome is called ... a locus. an allele. genetics. homologous
1.1The diagram below represents the female reproductive system in humans. Which ONE of the following correctly represents the events that take place at the parts labelled and Fertilisation implantation
1.1A ring of DNA (plasmid\ is taken from a bacterial cell to produce insulin. The ste ps below are NOT in the correct order. The gene for insulin is removed from a cell of a human pancreas The bacteria make clones of themselves and produce
1.1.7When a mouse with white fur was crossed with a mouse with black fur, the F generation had grey fur. What ratios of phenotypes could be expected in the F generation? 50% grey, 25% white, 25% black 75% white, 25% black
1.1.8In a human family the gene for right handedness (R\ is dominant over the gene for left handedness. The pedigree diagram of three generations is shown below. Grandmother Grandfather
1.1Which feature of the DNA molecule listed below is NOT always the same The order o f the bases on a single chain of the molecule The arrangement of the sugar
1.2Give the correct iological term for each of the following descriptions. Write only the term next to the question number (1.2 .1 to 1.2. \n the ANSWER BOOK.
1.2.6The phase during which DNA replicates prior to cell division An arr angement of black bars representing DNA fragments used to determine w ether people are related
1.3Indicate whether each of the statements in COLUMN I applies to A ONLY ONLY BOTH A AND or NONE of the items in COLUMN II. Write A only
1.3.1Used to artificially produce organisms with characteristics that are useful to humans A: Biotechnology B:
1.3A genetic disorder that is sex linked A: Haemophilia B: Albinism
1.3Results when a diploid cell divides during meiosis A: Four diploid cells B: Four haploid cells
1.3Whole chromoso mes move towards the poles of the cell A: Anaphase I B: Telo phase I
1.3wo different alleles of a gene are equally expressed in the phenotype A:
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2.1Study the diagram below showing a process during meios
2.1.1. .1. Label structures Which process is illustrated in the diagram? During which p hase of meiosis
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3.1The diagram below shows the circulation of blood in the wall of the uterus of a pregnant woman. The arrows in dicate th ection of flo of blood
3.1.2abel st uctures Which blood vessel or carries the following: (a\ (b\
3.1.4The foetal capillaries are located inside numerous finger like villi. Explain why this is useful. Name and describe the role of the TWO glands and the
3.2Some people have the ability to roll their tongue (rollers\ while other people cannot roll their tongues (non rollers\ Richard carried out an investigation to find out if there was a difference between the numbers of boys and girls who were rollers. In this invest
3.3.4Calculate the percentage decrease in the number of cases of gonorr hoea between 2001 and 2004. Show ALL working. Describe the pattern of cases of gonorrhoea between 1997 and 2002. State
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4.1Explain THREE advantages of using genetica lly modified organisms for food. (6\
4.2There are red flowered, white flowered and pink flowered varieties in a certain plant. The results of two crosses are shown in the table below. Crosses Number of plants of each colour