- Resistance to diseases/ pests/ adverse weather conditions
- Increased yields
- Earlier maturity
johnmulu answered the question on May 13, 2017 at 07:57
- (a) What is meant by the term genetics
(b) State two examples of discontinuous variation. (Solved)
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Date posted: May 13, 2017. Answers (1)
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State three structural differences between DNA and RNA.
Date posted: May 13, 2017. Answers (1)
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Date posted: May 13, 2017. Answers (1)
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(b) Name two sex linked traits in human beings. (Solved)
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(b) Name two sex linked traits in human beings.
Date posted: May 13, 2017. Answers (1)
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(ii) continuous variation and discontinuous variation.
(b) What would be the expected results from a test cross? (Solved)
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(b) What would be the expected results from a test cross?
Date posted: May 13, 2017. Answers (1)
- (a) What is meant by the term non-disjunction?
(b) Give an example of genetic disorder caused by: (i) Non-disjunction; (ii) Gene mutation. (Solved)
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Date posted: May 13, 2017. Answers (1)
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Date posted: May 13, 2017. Answers (1)
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(b) State two causes of chromosomal mutations. (Solved)
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(b) State two causes of chromosomal mutations.
Date posted: May 13, 2017. Answers (1)
- (a) What is meant by non-disjunction?
(b) Give two examples of continuous variation in humans(Solved)
(a) What is meant by non-disjunction?
(b) Give two examples of continuous variation in humans
Date posted: May 13, 2017. Answers (1)
- (a) What is meant by the term allele?
(b) What is a test-cross? (Solved)
(a) What is meant by the term allele?
(b) What is a test-cross?
Date posted: May 13, 2017. Answers (1)
- (a) Name two disorders in human caused by gene mutation.
(b) Describe the following chromosomal mutations. (i) Inversion (ii) Translocation(Solved)
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Date posted: May 13, 2017. Answers (1)
- (a) What is meant by the term sex-linkage?
(b) Name two sex-linked traits in humans. (Solved)
(a) What is meant by the term sex-linkage?
(b) Name two sex-linked traits in humans.
Date posted: May 13, 2017. Answers (1)
- Give an example of a sex-linked trait in humans on:
Y - CHROMOSOME.
X - CHROMOSOME. (Solved)
Give an example of a sex-linked trait in humans on:
Y - CHROMOSOME.
X - CHROMOSOME.
Date posted: May 13, 2017. Answers (1)
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State two characteristics that researchers select in breeding programme.
Date posted: May 13, 2017. Answers (1)
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Tallness in pea plants is due to a dominant gene. Two tall pea plants were crossed and their F 1 generation were in the ratio of 3 tall: 1 short. using letter T to represents the gene for tallness and t for shortness give the
(a) (i) Genotype of the parents
(ii) Gamete of the parents
(iii) Genotype ratio of the F 1 generation
(b) What is meant by the term testcross in genetic studies?
Date posted: May 13, 2017. Answers (1)
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Name three types of chromosomal mutations.
Date posted: May 13, 2017. Answers (1)
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In a breeding experiment, plants with red flowers were crossed. They produced 123 plants with red flowers and 41 with white flowers
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Date posted: May 13, 2017. Answers (1)
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Date posted: May 12, 2017. Answers (1)
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Date posted: May 12, 2017. Answers (1)