Cloned animals are typically not entirely genetically identical to their cloned parent. Why?
What will be an ideal response?
Cloned animals are usually made by transplanting a somatic cell nucleus into an enucleated oocyte from a donor. Unless the donor cell is from the same maternal lineage as the somatic cell, the mitochondria and the mitochondrial DNA will be that of the egg donor, not the clone parent.
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Place the following events of bacterial conjugation in order from first to last.
1 - DNA replication 2 - an enzyme joins F factor DNA ends 3 - sex pilus shortens 4 - DNA transfer 5 - an enzyme cuts F factor DNA A. 1, 2, 3, 4, 5 B. 3, 5, 4, 2, 1 C. 5, 1, 3, 4, 2 D. 3, 5, 1, 4, 2 E. 3, 5, 1, 2, 4
The transport of what molecules or particles across the thylakoid membrane power the production of ATP?
a. electrons b. hydrogen ions c. oxygen d. carbon dioxide e. phosphate ions
In meiosis, _____ are separated during anaphase I, and _____ are separated during anaphase II
a. heterologous chromosomes; homologous chromosomes b. homologous chromosomes; homologous chromosomes c. homologous chromosomes; sister chromatids d. sister chromatids; homologous chromosomes e. sister chromosomes; homologous chromosomes
About 12,000 years ago, a mass extinction event occurred and 75% of the world's large mammal species were eliminated. While a small number of cheetahs managed to survive and restore the world's population of cheetahs, this event caused an extreme reduction of the cheetah's genetic diversity. Based on the principles of natural selection, which of the following is a consequence of their reduced genetic diversity?
A. Cheetahs within the same population do not vary in their reproductive success. B. Cheetahs have never fully adapted to the current environment. C. Cheetahs are unable to effectively compete with each other for resources. D. Cheetahs have very little heritable variation, which will make it difficult for them to adapt as the environment changes.