Assume that the cell in the figure below is from a crayfish testis and is about to undergo spermatogenesis (gamete production by meiosis). The letters represent alleles at particular gene positions (e.g., A and a alleles for one gene; B and b alleles for another gene, etc.) on each
a. Have the chromosomes replicated yet? Is the cell shown haploid or diploid? HOW DID YOU DECIDE? What is the haploid number of a sperm cell from this the crayfish? What is the diploid number of this crayfish’s somatic cells?
b. How many chromosomes might you observe in a muscle cell at G0 from this crayfish?
c. What are all the possible combinations of alleles that could be found in a gamete produced by the cell in the figure above?
d. Which of Mendel's laws tells us that a gamete containing a chromosome with the "A" allele will not necessarily contain a chromosome with a "B" allele?
e. Which of Mendel's laws tells us that a gamete cannot contain both an "A" allele and an "a" allele?
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