What would cause a person to have two copies of the bent thumb allele (tt)? 1. A person whose mother or father had two copies of the bent thumb allele will always have two copies of the allele.

2.A person with two copies of "t" inherited one from their mother and one from their father.

3. A person born with one "t" mutation is more likely to develop a second "t" mutation during their lifetime.

4. A person with two copies must have duplicated the "t" allele through mitosis early in development. (They inherited one, then doubled it)

A person with two copies of "t" inherited one from their mother and one from their father

Explanation:

This is because both the father and the mother are carriers of "t" alleles which is a bent thumb. When the parent mate, the father donate one t and the mother too donate one t allele, therefore the person will inherit bent thumb from them.

Answer and Explanation:

a. Primary producers

Primary producers are organisms that are able to produce their own food, also known as autotrophs. The best example to illustrate this group are plants. They have a major role in the carbon cycle as they transform inorganic molecules from the atmosphere, such as CO2, into organic molecules like carbohydrates.

b. Secondary producers

Secondary producers are organisms that feed on primary producers, that is, they are heterotrophs (and herbivores), which are then consumed by predators. For example, caterpillars or rabbits. When these organisms respirate, they exhale carbon dioxide, which is used by primary producers in the carbon cycle.

c. Decomposers

Decomposers are organisms that consume and break down organic matter such as dead animals, feces, and leaves. For example, fungi and bacteria. Through this process, they release CO2 and methane into the atmosphere, making carbon dioxide available for plants to carry out photosynthesis.