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(a) It is an alternative form of a gene/ or a gene/ or variant form of a gene; one of two or more alternative state of a gene.
(b) It's a cross made between a homozygous recessive parent and a parent of unknown genotype to determine whether the unknown type is homozygous or heterozygous for a dominant gene
johnmulu answered the question on May 13, 2017 at 06:02
- (a) Name two disorders in human caused by gene mutation.
(b) Describe the following chromosomal mutations. (i) Inversion (ii) Translocation(Solved)
(a) Name two disorders in human caused by gene mutation.
(b) Describe the following chromosomal mutations. (i) Inversion (ii) Translocation
Date posted: May 13, 2017. Answers (1)
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(b) Name two sex-linked traits in humans. (Solved)
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Date posted: May 13, 2017. Answers (1)
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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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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
(a) Identify the recessive character. give a reason
(b) What was the genotype of the plants that gave rise to the plants with red and white flowers?
(c) If the white flowers were selfed, what would be the genotypes of their offspring?
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)
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In an experiment the shoot tip of a young tomato plant was decapitated as shown in the diagram below.
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(b) Give a reason for your answer in (a) above
Date posted: May 12, 2017. Answers (1)
- (a) The state during which a seed cannot germinate even when conditions for germination are suitable is called
(b) The diagram below represents a stage during germination of a seed. (Solved)
(a) The state during which a seed cannot germinate even when conditions for germination are suitable is called
(b) The diagram below represents a stage during germination of a seed.
(i) Name the type of germination illustrated in the diagram.
(ii) State the role of the part labeled x during germination of the seed
Date posted: May 12, 2017. Answers (1)