The skin cells of an adult female rat has 40 autosomes and 2 sex chromosomes. A healthy egg cell would contain which number and type of chromosomes?
A. 20 autosomes and 1 X chromosome
B. 20 autosomes and 1 Y chromosome
C. 40 autosomes and 2 X chromosomes
D. 40 autosomes and 2 Y chromosomes
Ans: A. 20 autosomes and 1 X chromosome
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