本题目来源于试卷: SL/HL Topic D3.2 Inheritance，类别为 IB生物学
[问答题]
c. The roan colour, polled cow in d0kogs51j (wu the image is matedb e: dg+9gq*ctxb8yw5 with a white coat, horned bul8 9+5dw:ecxqtg gby*bl.
Construct a Punnett square showing all possible phenotypes of the offspring.
参考答案: Any three of these points for 3 marks:
Roan polled genotyme is RWPp and White horned genotype is WWpp 1 mark for correct gametes in the Punnett square.
1 mark for the four genotypes
1 mark for identifying phenotypes.
1 mark for ratio. Ratio 1:1:1:1 (25% of offspring have each phenotype)
本题详细解析:
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