Could a species with a small number of chromosomes have a larger genome?

Does number of chromosomes affect genome size?

An organism’s genome size doesn’t depend on the number of genes (or chromosomes) it contains. In bacteria and viruses, there is a linear relationship between the size of the genome (that is, the totality of DNA) and the number of genes.

Does genome size correlate with number of genes?

In prokaryotes, genome size and gene number are strongly correlated, but in eukaryotes the vast majority of nuclear DNA is non-coding.

What determines genomic size of a species?

The genome size (i.e., the C-value) is defined as the amount of DNA in a haploid genome. … The C-value is calculated by dividing the mass of the DNA sample and by the copy number of the target gene, which is determined by absolute quantification on the LightCycler.

Does more chromosomes mean larger genome?

So complexity cannot be determined through the size of the genome or the number of chromosomes. Answer 2: No. More complex organisms often have larger genomes, but there are some very complicated organisms with very small genomes and likewise some surprisingly simple organisms with very large genomes.

What happens if you have 45 chromosomes?

Turner syndrome (TS), also known as 45,X, or 45,X0, is a genetic condition in which a female is partly or completely missing an X chromosome.

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Why are genome size and gene number not correlated quizlet?

When researchers compared genome size by measuring the amount of DNA per cell (the C-value) across numerous species, they discovered that differences in genome size do not correlate in any straightforward way with the number of protein-coding genes that an organism has, nor with its phenotypic complexity.

What causes genome size variation?

Genome sequencing has revealed that this variation is primarily caused by gene-, chromosome-, or genome duplications, by variation in the length of introns, number of transposons, and the amount of simple repetitive DNA (Kidwell 2002; Bennetzen et al.

Do genomes have to increase in size with an increase in protein products?

The number of protein-coding genes usually caps off at around 25,000 or so, even as genome size increases.

How Many Protein-Coding Genes Are in That Genome?

Species and Common Name Estimated Total Size of Genome (bp)* Estimated Number of Protein-Encoding Genes*
Homo sapiens (human) 2.9 billion 20,000-25,000