What is briefly ideas the word community ?​

A community can be defined as the populations of different species living togather in a place ata same time and interacted with one another.

Explanation:

A forest is a community in which populations of different trees, herbs, insects, animals and invertebrates etc. are living in same place at a same time. All these species are interacting with one another in a community.

A community is a social unit (a group of living things) with commonality such as norms, religion, values, customs, or identity. Communities may share a sense of place situated in a given geographical area (e.g. a country, village, town, or neighbourhood) or in virtual space through communication platforms.

Lethal alleles cause the death of an organism prenatal or after the birth. Lethal alleles are usually a consequence of a mutation and they can be recessive, dominant or conditional. Since the lethal dominant alleles are harmful whether they are carried in homozygous (e.g.AA) or heterozygous (e.g.Aa) form,  a strong selection against them is present and thus these alleles are much more rare.