[生物] 兩題遺傳問題請教~~
Which is a mutant characteristic in fruit flies?
A)gray body B)black body C)long wings
When two dihybrid organisms are crossed and simple dominance is present
in both genes a _____ phenotype ratio will result.
A)1:2:1
B)3:1
C)9:3:3:1
D)1:1:1:1
ans:B，A
why?
第一題我完全不知道為何選隱性的???
第二題1:2:1哪裡有寫出是不完全顯性??
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