List the following events of oogenesis and fertilization, assuming fertilization does occur, in the correct sequence beginning with the first event to occur at the top.
What will be an ideal response?
Answer:
- Primary oocyte meiosis 1
- haploid cells
- fertilization
- completion of meiosis 2
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Pesticide use has grown a great deal in the past century, and similar to the plant-herbivore evolutionary "arms race":
A. increased use of pesticides is leading to increased rates of resistance. B. widespread chemical treatments pose little concern because they wipe out all existing herbivores. C. pesticides are killing pests and their predators, reducing the overall level of herbivory in crop plants.
Explain the basic mechanism CRISPR in DNA manipulation
What will be an ideal response?
All gametes contain
a. two chromosomes. b. two identical sets of chromosomes. c. two different sets of chromosomes. d. one chromosome. e. one set of chromosomes.
Which of the following nucleotide bases are present in equal amounts in DNA
a) adenine and guanine b) adenine and cytosine c) thymine and cytosine d) adenine and thymine e) thymine and guanine