1. A species has four sets of chromosomes. How many moleculesof DNA do the nucle

Question

1. A species has four sets of chromosomes. How many moleculesof DNA do the nuclei have during the G2 phase? a.) 4 b.) 8 c.) 16 d.) 32 2. Which of a man's relatives could not be the source of anyof the genes on his Y chromosome? a.) father's mother b.) mother's father c.) mother's mother d.) father's father, mother's father, father's brother e.) mother's mother, mother's father, father's mother. I am especially very confused with this last one. Couldsomeone please explain how they got their answer? 1. A species has four sets of chromosomes. How many moleculesof DNA do the nuclei have during the G2 phase? a.) 4 b.) 8 c.) 16 d.) 32 2. Which of a man's relatives could not be the source of anyof the genes on his Y chromosome? a.) father's mother b.) mother's father c.) mother's mother d.) father's father, mother's father, father's brother e.) mother's mother, mother's father, father's mother. I am especially very confused with this last one. Couldsomeone please explain how they got their answer?

Explanation / Answer

1. I would not know how many molecules of DNA ( it doesn't even sayhow many chromosomes are in each set), but the nuclei would have 8sets of chromosomes. The normal set amount was doubled in the Sphase. 2. Each person has a pair of sex chromosomes. A female has XX and amale has XY. A female is only able to give a X chromosome to herchild. A male can either give a X or a Y. So any mother can not bea source of a Y chromosome. A father's mother can not be a Ychromosome source because she does not have a Y. A mother's fathercould be a source, but the mother recieved a X from her father, soshe could not pass a Y to the male offspring. A mother's motherdoes not have an Y. Answer D has a father's father who is apossible source of a Y chromosome. The best answer would be E. Allof those relatives are not able to donate a Y chromosome to themale offspring.

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