Ancestry can be traced by maternal lineage using ____________________, and by paternal lineage using
____________________. Fill in the blank(s) with the appropriate word(s).
ANSWER: mitochondrial DNA; Y chromosome DNA
mitochondrial DNA markers; Y chromosome markers
mitochondrial DNA; Y chromosome markers
mitochondrial DNA markers; Y chromosome DNA
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Mutations may arise by replication error, __________ activity, or exposure to environmental hazards. Fill in the blank(s) with the appropriate word(s)
Metaphase II arrest is mediated by ________, a biochemical activity present in mature eggs
Fill in the blank with correct word.
an organism proceeds through meiosis and produces sex cells with 32 chromosomes (e.g., a horse), the cells of the horse's brain will each contain ______ chromosomes.
A. 32 B. 16 C. 64 D. 12
Which of the following terms best describes the first primitive eukaryotes?
A) multicellular B) single-celled C) photosynthetic D) specialized