题目
题目

AGRI10051_2025_SM2 Supplementary or Special Exam: Genetics for Agriculture (AGRI10051_2025_SM2)- Requires Respondus LockDown Browser

单项选择题

If a cross produced a 12:3:1 phenotypic ratio in 320 offspring, how many offspring would you expect to be homozygous recessive at both loci?

选项
A.3
B.20
C.32
D.16
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标准答案
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思路分析
We are told that the cross yields a phenotypic ratio of 12:3:1 in 320 offspring. To translate this into a count, think of the ratio as 12 parts : 3 parts : 1 part, totaling 16 parts. Option analysis: - Option 3 (32): If 32 were correct, that would correspond to 32/320 = 1/10, which does not match any 12:3:......Login to view full explanation

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