At __________, the fusion of two gametes produces a(n) __________.
Fill in the blank(s) with the appropriate word(s).
fertilization; zygote
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Crossing over is one of the most important events in meiosis because
a. it produces new combinations of alleles on chromosomes. b. homologous chromosomes must be separated into different daughter cells. c. the number of chromosomes allotted to each daughter cell must be halved. d. homologous chromatids must be separated into different daughter cells. e. the number of chromosomes allotted to each daughter cell must be split in fourths.
The region of the human brain is that is critically important for monitoring and controlling movements is the
A. cerebral cortex. B. hypothalamus. C. cerebellum. D. basal nuclei. E. medulla oblongata.
Non-disjunction occurs during meiosis I in a human so that only chromosome #3 is affected. The rest of meiosis proceeds normally. For the 4 gametes formed from this round of meiosis, which of following is a correct description of their chromosome number?
a) 2 gametes will have 23 chromosomes and 2 gametes will have 24 b) 2 gametes will have 22 chromosomes and 2 gametes will have 24 c) all of the gametes will have 22 chromosomesd) all of the gametes will have 24 chromosomes d) all of the gametes will have 24 chromosomes
Small subcutaneous hemorrhages called (granulations/macules/petechiae) are sometimes present in cases of meningitis
What will be an ideal response?