Concept 30 Higher cells incorporate an ancient chromosome.
Ivan Wallin.
An electron micrograph of a mouse liver cell. Magnification approximately 12,000 times.
There are genetic disorders due to the mutations in mitochondrial genes. These disorders are inherited from the mother.
Why keep mitochondria and chloroplasts as separate organelles? Why not incorporate their DNA into the nucleus?
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Ivan Wallin.
DNA is packaged in a chromosome.
Higher cells incorporate an ancient chromosome.
Some DNA does not encode protein.
Some DNA can jump.
Genes can be turned on and off.
Genes can be moved between species.
DNA responds to signals from outside the cell.
Different genes are active in different kinds of cells.
Master genes control basic body plans.
Development balances cell growth and death.
A genome is an entire set of genes.
Living things share common genes.
DNA is only the beginning for understanding the human genome.