Many genes are arranged along the chromosomes in groups of related genes. These groups are called gene clusters. Examples of gene clusters are the globin gene family.

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#Id: 4017

#Unit 2. Cellular Organization

Chromosomes occupy chromosome territories in the nucleus and are not entangled with each other.

Heterochromatic regions, silenced genes, and gene-sparse regions of chromosomes are typically localized to the nuclear periphery.

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#Id: 7129

#Unit 6. System Physiology – Plant

Strigolactones act locally to repress axillary bud growth

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#Id: 1866

#Unit 10. Ecological Principles

Amensalism- One species has a strong effect on another, but the reverse effect is negligible.

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#Id: 3526

#Unit 2. Cellular Organization

A point mutation that affects a restriction site is detected by a difference in restriction fragment lengths.

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#Id: 6222

#Unit 12. Applied Biology

The genomes of all retroviruses contain the three genes gag, pol and env.