求翻译：因为白色基因d是隐性基因，所以白色飞蛾的基因是dd,它占81%，代表单基因d占基因总数的90%，进而D基因占10%，所以DD基因所占比例为10%×10%=1%是什么意思？

D of white gene is a recessive gene, so the white moths gene is the dd, it accounted for 81%, representing a single gene d accounted for 90% of the total number of genes, and thus the d gene accounted for 10%, so the dd gene proportion 10% × 10% = 1%

Because white gene D is a recessive gene, so the white moth genes, it is a DD, 81 per cent of genes, Gene D 90 per cent of the total, and 10% for D gene DD gene, so the proportion of 10% X 10% = 1%

Because white gene d is the recessive gene, therefore the white moth's gene is dd, it accounts for 81%, generation of form gene d accounts for the gene total 90%, then the D gene accounts for 10%, therefore the DD gene accounts for the proportion is 10%×10%=1%

D because white gene is recessive gene, so the white moth gene is dd, it 81% on behalf of single-gene d cent 90% gene, d Gene 10%, so the proportion of DD gene to 10%X10%=1%

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