• Skin color and height is controlled by a lot of genes and every human gets one set of genes from their mother and the other set of genes from their father.

• Now imagine these genes are denoted as ‘T’ for tall and ‘B’ for brown and ‘t’ for short ‘b’ brown. We can assume that MR Mwape and his wife having genotype TtBb.

• During the process of gene segregation and assortment, the majority percentage of children got the heterogenous dominant genotype, which is ‘TtBb’, overlapping the effect of gene ‘t’ and ‘b’. While another child got a homogenous recessive genotype ‘ttbb’ from both the parents, hence the genotype is prominently shown in the fourth child and not in other as gene 't' and 'b' were dominated by genes 'T' and 'B'.

To learn more about Mendel’s law, refer: -

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8 0

2 years ago

the human is able regulate blood sugar levels within a fairly specific range, even high amounts of carbohydrates are consumed

Stells [14]

Question options:

1. Homeostasis

2. Digestion

3. Embryology

4. Cellular respiration

Answer:

1. Homeostasis

Explanation:

Sugar level in humans is regulated by "Insulin" and "glucagon" hormones that are secreted by the pancreas. Both hormones work in a balanced way to regulate the blood sugar level within a specific range if the sugar levels spike or drop.

Together, insulin and glucagon help maintain a state known as homeostasis. By definition, homeostasis is the maintenance of the internal environment of cell/body with respect to the external environment. Thus, homeostasis maintains a relatively stable state that persists despite changes in the world outside. When blood sugar is too high, the pancreas secretes more insulin which acts to trigger breakdown of sugar thus reducing its level. By contrast, when blood sugar levels drop, the pancreas releases glucagon to allow conversion of macromolecules to simple sugars and raise its level.

5 0

3 years ago