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Pollen from a red – flowered plant A was used to pollinate white flowered plant B, the seeds from which produced 157 red-flowered plants. When...
(Solved)
Pollen from a red – flowered plant A was used to pollinate white flowered plant B, the seeds from which produced 157 red-flowered plants. When a red flowered plant C was pollinated by a white-flowered plant D, the resultant seeds gave rise to 84 red-flowered plants: and 91 white flowered plants. Assuming that plants A, B, C, and D were all of the same species and that flower colour in that species is controlled by a single pair of genes.
Using R for dominant gene and r for recessive gene, write down the genotypes of the following.
i)Plant A
ii)Plant B
iii)Progeny of A x B cross
iv)Plant C
v)Plant D
vi)Red flowered progeny of C x D cross.
Date posted:
October 1, 2019
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Answers (1)
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State two symptoms of gout disease in man.
(Solved)
State two symptoms of gout disease in man.
Date posted:
October 1, 2019
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Answers (1)
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Distinguish between gaseous exchange and respiration
(Solved)
Distinguish between gaseous exchange and respiration
Date posted:
October 1, 2019
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Answers (1)
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Nocturnal animals such as the owl are capable of seeing fairly well at night. What two adaptations have made this possible.
(Solved)
Nocturnal animals such as the owl are capable of seeing fairly well at night. What two adaptations have made this possible.
Date posted:
October 1, 2019
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Answers (1)
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A scientist has discovered a rare disease that attacks the respiratory system in insects. Name two parts of an insect, which are most likely to...
(Solved)
A scientist has discovered a rare disease that attacks the respiratory system in insects. Name two parts of an insect, which are most likely to be damaged by the disease.
Date posted:
October 1, 2019
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Answers (1)
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Under what condition would a plant lose more water than its absorbing from the soil.
(Solved)
Under what condition would a plant lose more water than its absorbing from the soil.
Date posted:
October 1, 2019
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Answers (1)
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Explain how Antiduretic hormone regulates osmotic potential in the body
(Solved)
Explain how Antiduretic hormone regulates osmotic potential in the body
Date posted:
October 1, 2019
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Answers (1)
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Distinguish between Secretion and excretion.
(Solved)
Distinguish between Secretion and excretion.
Date posted:
October 1, 2019
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Answers (1)
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Explain the disadvantages of using acarides in tick control
(Solved)
Explain the disadvantages of using acarides in tick control
Date posted:
October 1, 2019
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Answers (1)
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Name two methods that would be used to measure growth in plants.
(Solved)
Name two methods that would be used to measure growth in plants.
Date posted:
October 1, 2019
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Answers (1)
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State two precautions you would observe when preparing a bacteria culture in the laboratory.
(Solved)
State two precautions you would observe when preparing a bacteria culture in the laboratory.
Date posted:
October 1, 2019
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Answers (1)
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Using a punnet square, explain why the view that “some women have a tendency to giving birth to girl or boy babies only” has...
(Solved)
Using a punnet square, explain why the view that “some women have a tendency to giving birth to girl or boy babies only” has no scientific foundation.
Date posted:
October 1, 2019
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Answers (1)
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In maize, yellow colour is dominant over White colour. Using letter W to denote gene for maize colour, show how one would establish whether a...
(Solved)
In maize, yellow colour is dominant over White colour. Using letter W to denote gene for maize colour, show how one would establish whether a given sample of yellow maize is pure or a hybrid.
Date posted:
October 1, 2019
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Answers (1)
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Explain how submerged hydrophytes obtain their oxygen for respiration at night
(Solved)
Explain how submerged hydrophytes obtain their oxygen for respiration at night
Date posted:
October 1, 2019
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Answers (1)
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Name the process which occurs in mammalian liver that lead to formation of urea
(Solved)
Name the process which occurs in mammalian liver that lead to formation of urea
Date posted:
October 1, 2019
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Answers (1)
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State the functional differences between pulmonary artery and pulmonary vein.
(Solved)
State the functional differences between pulmonary artery and pulmonary vein.
Date posted:
October 1, 2019
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Answers (1)
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Explain how a genetic trait is inherited in a mammal.
(Solved)
Explain how a genetic trait is inherited in a mammal.
Date posted:
October 1, 2019
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Answers (1)
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Explain why a breastfeeding woman generally require more protein in her daily diet than a normal woman.
(Solved)
Explain why a breastfeeding woman generally require more protein in her daily diet than a normal woman.
Date posted:
October 1, 2019
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Answers (1)
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What is the importance of crossing–over in cell division?
(Solved)
What is the importance of crossing–over in cell division?
Date posted:
September 30, 2019
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Answers (1)
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State four differences between mitotic and meiotic divisions.
(Solved)
State four differences between mitotic and meiotic divisions.
Date posted:
September 30, 2019
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Answers (1)