Human genome characteristics Place the terms into the correct sentences about th

Question

Human genome characteristics

Place the terms into the correct sentences about the characteristics of the human genome.

Choose one of these : Multigene families, 24%, 1%, noncoding, single-copy genes, tandem clusters, 99%, coding, segmental duplications.

1-Only about ------ of the human genome is composed of protein encoding genes.

2-The information for proteins is found in ----- DNA; the rest of DN, nearly -------, is noncoding.

3-Although many human genes exist as ----------, there are still many others that exist in multiple copies. Blocks of genes called ------- are those that have been copied from one chromosome to another.

4- Identical copies of genes repeated many times in a row are called --------, and transcription of all of the copies can allow the cell to obtain large amounts of the protein they encode.

5-Groups of related but different genes that occur together in a cluster are called ------- and likely arose from a single ancestral sequence.

Explanation / Answer

1. Only about 24% of the human genome is composed of protein encoding genes.

2. The information for proteins is found in 1% DNA; the rest of DNA, nearly 99%, is noncoding.

3. Although many human genes exist as single copy genes, there are still many others that exist in multiple copies. Blocks of genes called segmental duplications are those that have been copied from one chromosome to another.

4- Identical copies of genes repeated many times in a row are called tandem clusters, and transcription of all of the copies can allow the cell to obtain large amounts of the protein they encode.

5. Groups of related but different genes that occur together in a cluster are called -multigene families and likely arose from a single ancestral sequence.

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