When a population has a gene with four alleles circulating, how many possible genotypes are there?

10 possible genotypes

Explanation:

Genotype is defined as the genetic makeup of an individual, ie the set of all genes in that organism. The gene, in turn, can be defined as a specific nucleotide sequence of DNA that stores hereditary information. They present information that will be responsible for a given characteristic. Each individual has a specific genotype that is made up of genes from their parents that will be kept for the life of the organism.

To know how many genotypes a population can present from the number of alleles, we must calculate by the formula: alleles x (alleles+1)/2

This way we will have:

4x (4 + 1) / 2 =

4x (5) / 2 =

20/2 = 10 possible genotypes.

the correct answer should be false

{apex}

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!