In human chromosomes, satellite DNA sequences of about 170 base pairs in length are present in tandem arrays of up to 1 million base pairs. Found mainly in centromere regions, these DNA sequences are called .

The correct answer to fill in the blank is: Alphoid families.

Explanation:

Alphoid repetitive DNA is found in the centromeres. This satellite DNA constitutes an important portion of heterochromatin and consists of a large array of non-coding DNA that repeats tandemly (meaning that one gene is duplicated and can be found adjacent to the original copy).

Non-coding DNAs are DNA sequences that do not encode for any proteins.

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands