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(a) Failure of homologous chromosomes to segregate during meiosis/ anaphase I/ Meiosis I
(b) (i) Down's syndrome (or Mongolism), Turner's syndrome, Klinefelter's Syndrome.
ii) Albinism, single cell anaemia, haemophilia, colour blindness, chondrodytrophic dwarfism/ Achondroplasia
johnmulu answered the question on May 13, 2017 at 07:12
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State two advantages of hybrid vigour
Date posted: May 13, 2017. Answers (1)
- (a) What is meant by the following terms (i) hybrid vigour (ii) Polyploidy?
(b) State two causes of chromosomal mutations. (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) What is a test-cross? (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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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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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
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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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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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State three roles of auxins in a plant stem.
Date posted: May 12, 2017. Answers (1)
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Date posted: May 12, 2017. Answers (1)
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State three factors in seeds that cause dormancy.
Date posted: May 12, 2017. Answers (1)
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Date posted: May 12, 2017. Answers (1)
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State three aspects that can be used to estimate growth in seedlings -
Date posted: May 12, 2017. Answers (1)
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Date posted: May 12, 2017. Answers (1)