Answer:
-A single gene can influence multiple traits.
-A single trait can be controlled by multiple genes.
Explanation:
1. A single gene influences two or more phenotypic traits known as a pleiotropic gene. Pleiotropy is common in the genetics of complex disease.
Example: Phenylketonuria
It is an inherited disorder in which the level of phenylalanine is increased in the human body. This is happening because of the defect in a single gene on chromosome 12 that codes for phenylalanine hydroxylase (enzyme). This enzyme affects multiple system e.g., nervous and integumentary systems.
2. A polygenic trait is one whose phenotype is influenced by more than one gene. Polygenic traits are also controlled by environmental factors.
Example: Height, Skin color
These traits show continuous distribution because they are also controlled by many different genes. Epigenetics and environmental factors are also involves.
Mandalian (inherited) traits are controlled by different genes.
<span>If the black horse is homozygous, what is its genotype?
BB
If the black horse is heterozygous, what is its genotype?
Bb
Hope this helps!
-Payshence xoxo</span>
Your answer is B
When the F1 generation exhibits both the parental characters, this is called codominance. The offspring will be a combination of both the parent. The ABO blood group system is one of the best examples of codominance. There are different types of red blood cells such as A, B, AB and O with or without the Rh factor.
Sure hope this helps
Answer: B - mosses and lichens that can grow on Rocky surfaces
Explanation: Primary succession usually starts or begins on rock outcrops. It could include bare surfaces, volcanic mountains or an area (water surfaces) with no soil.
In primary succession, pioneer organisms including algae, lichen, mosses and fungi usually are the pioneer species. Other abiotic factors like wind and water play roles of normalizing the habitat.
