Answer :
In the context of genes and traits, the correct statements are:
1. A single gene can control a single trait.
2. A single gene can influence multiple traits.
4. A single trait can be controlled by multiple genes.
Explanation:
1. A single gene can control a single trait: This is true because some traits are controlled by one specific gene. For example, the gene responsible for determining blood type in humans is controlled by a single gene with three variants: A, B, and O.
2. A single gene can influence multiple traits: This statement is correct as well. One gene can have pleiotropic effects, meaning it can influence multiple traits. An example of this is the gene responsible for Marfan syndrome, which can affect various traits such as height, eye health, and cardiovascular health.
4. A single trait can be controlled by multiple genes: This is also true. Many traits are polygenic, meaning they are controlled by multiple genes. An example of this is human height, which is influenced by the interaction of multiple genes.
By understanding these concepts, you can see the complexity and interplay between genes and traits, showcasing the intricate relationship that exists in genetics.
