With respect to this gene, it is reasonable to predict that the cross
A - VCE - SSCE Biology - Question 6 - 2002 - Paper 1
Question 6
With respect to this gene, it is reasonable to predict that the cross
A. SS x Ss results in both solid-coloured and white-saddle cattle.
B. Ss x Ss results in both s... show full transcript
Worked Solution & Example Answer:With respect to this gene, it is reasonable to predict that the cross
A - VCE - SSCE Biology - Question 6 - 2002 - Paper 1
Step 1
A. SS x Ss results in both solid-coloured and white-saddle cattle.
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Answer
This cross can produce different phenotypes due to the presence of two alleles: S (solid-coloured) and s (white-saddle). The genotype SS can only produce solid-coloured cattle, while Ss can produce both solid-coloured and white-saddle offspring.
Step 2
B. Ss x Ss results in both solid-coloured and white-saddle cattle.
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Answer
This cross can indeed result in both solid-coloured (SS or Ss) and white-saddle (ss) cattle. Thus, both phenotypes are possible.
Step 3
C. SS x SS results in only solid-coloured cattle.
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Answer
Since both parents are SS, all offspring will inherit the solid-coloured allele, resulting in only solid-coloured cattle.
Step 4
D. ss x ss results in only white-saddle cattle.
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Answer
This cross will produce only ss offspring, thereby resulting in only white-saddle cattle.
