Question

What is the difference between an allele and a chromosome?

Answer 1

Allele: A form of a gene at a specific location (locus) on a chromosome is known as an allele.

Chromosome:

1. Chromosomes are a component of the cell's nucleus.
2. Chromosomes are found in pairs, each gene in an organism has two alleles, one on each chromosome of the pair.

Allele	Chromosome
Alleles are the variants of a gene that are located in the same place on a chromosome.	On the other hand, a chromosome is a thread-like structure in which DNA is tightly packaged within the nucleus.
2. Plants and animals often contain two sets of chromosomes, one from each parent. Diploid organisms are those that have two chromosomes.	2. Histones are packaging proteins found in most eukaryotic chromosomes that, with the help of chaperone proteins, bind to and condense the DNA molecule to protect its integrity.
3. Because such species have two sets of chromosomes, they have two alleles at each gene locus (save on the sex chromosomes).	3. These chromosomes have a complicated three-dimensional structure that influences transcriptional control.
4. The organism's genotype is the set of alleles it carries. Alleles that aren't "expressed" are included in this category. i.e. alleles that have no effect on the characteristic for which they are coded.	4. The phenotype, on the other hand, is the expression of genes, or the specific features that are observed as a result of the organism's genetic composition.