a. Explain briefly the following terms: i. gene; ii. Hybrid; iii. Trait. (b) Two heterozygous...
BIOLOGY
WAEC 2018
a. Explain briefly the following terms:
i. gene;
ii. Hybrid;
iii. Trait.
(b) Two heterozygous yellow flowers are crossed. Using a genetic diagram, state the phenotypic and genotypic ratios of the first filial generation.
(c) State four transmitted characters in plants.
Explanation
(a) Explanation of terms
(i)Gene;Is a unit of heredity/genetic material; composed of DNA; located on the chromosome.
(ii)HybridIs an offspring; formed from a cross between parents that are genetically different but of same species.
(iii)Trait Is a feature/character; that is possessed by an organism; and can be transferred from parents to offspring.
(c) Transmittable characters in plants
- Type of seed
- Size of fruit
- Colour of flower
- Colour of leaf
- Height of plant
- Texture of seed coat
- Size of plant
- Leaf shape
- Any correctly named transmittable character
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