Answer:
Both parents would have to have one recessive gene.
Explanation:
Blond haired people have two recessive genes to have blond hair. Dark hair is dominant over blond hair. If B represents dark hair and b represents blond a person could have the two genes B and b. The dominant gene will win. For example: Bb produces dark hair. BB produces dark hair, but bb produces blond hair. Two blond haired people each will give a b characteristic to the offspring, producing blond hair. Two parents with Bb genes each have 1/2 chance of giving a b gene. Therefore two dark haired parents Bb have 1/4 chance of having a blond offspring. 1/2 times 1/2 gives 1/4 chance (if they have both the dominant and recessive genes).Two parents with BB can not have a blond haired offspring.
Answer:
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Explanation:
Al crossmultiplies with 2
S crossmultiplies with 3
Al2S3
Answer: the absorption of water by the roots
Explanation:
Evaporation of water through the leaves is known as transpiration, and it occurs readily only when environmental conditions such as humidity is high.
On the other hand, the absorption of water by root hairs which is then conducted by the xylem vessels up the stem to various parts of the plant is a important process that determines how water move through a plant to ensure cellular processes such as photosynthesis, respiration etc takes place.
Thus, the absorption of water by the roots plays a much more important role in the movement of water in a plant