In a life cycle such as that shown in part III of the figure above, if the zygote's chromosome number is 10, which of the following will be true?
A) The sporophyte's chromosome number per cell is 10 and the gametophyte's is 5.
B) The sporophyte's chromosome number per cell is 5 and the gametophyte's is 10.
C) The sporophyte and gametophyte each have 10 chromosomes per cell.
D) The sporophyte and gametophyte each have 5 chromosomes per cell.
A
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Sperm may be "washed" prior to intrauterine insemination to remove
A) seminal fluid to prevent inflammation of the woman's tissues. B) sperm tails to enhance movement. C) bacteria and debris to prevent infection. D) the man's HLA antigens to prevent rejection by the woman's immune system.
If this woman is an albino, which is a recessive trait (a), and both her parents have normal coloration, what would you expect the genotypes of her parents to be? The mother is listed first, the father second
1.AA X aa
2.AA X Aa
3.Aa X Aa
4.aa X AA
All breast cancers result from a recessively inherited gene that suppresses cell division. Indicate whether the statement is true or false
Animals can navigate by using
A. sound. B. landmarks. C. sun. D. All of these answers are true.