请【遗传学】大牛进来解释In clover plants,the pattern on the leaves is de
请【遗传学】大牛进来解释
In clover plants,the pattern on the leaves is determined by asingle gene with multiple alleles that are related in a dominanceseries.7 different alleles of the gene are known; an allelethat determines the absence of a pattern is recessive to the other6 alleles,eah of which produces a different pattern.Allheterozygous combinations of alleles show complete dominance.
A.How many different kinds of leaf patterns (includingthe absence of a pattern) are possible in a population of cloverplants in which all seven alleles are represented?
B.What is the largest number of different genotypesthat could be associated with any one phenotype?Is there anyphenotype that could be represented by only a single genotype?
C.In a particular field,you find that the large majority of clover plants lack a pattern on their leaves,enen though you can identify a few plants representative of all possible pattern types.Explain this finding.
In clover plants,the pattern on the leaves is determined by asingle gene with multiple alleles that are related in a dominanceseries.7 different alleles of the gene are known; an allelethat determines the absence of a pattern is recessive to the other6 alleles,eah of which produces a different pattern.Allheterozygous combinations of alleles show complete dominance.
A.How many different kinds of leaf patterns (includingthe absence of a pattern) are possible in a population of cloverplants in which all seven alleles are represented?
B.What is the largest number of different genotypesthat could be associated with any one phenotype?Is there anyphenotype that could be represented by only a single genotype?
C.In a particular field,you find that the large majority of clover plants lack a pattern on their leaves,enen though you can identify a few plants representative of all possible pattern types.Explain this finding.
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A.7
B.largest – 13 (C1_),smallest – 1 (C7_)
C.Although according to the table,the amounts of clover plants that lack a pattern on their leaves should be thelowest,but actually it exists with highest amounts.This may be due to many reasons:
i.The recessive allele C7 is the ancestor for the other dominantalleles.The presence of other alleles may be is due to some mutations in gene,so they will exist in lower amounts compare to the original allele.
ii.Or due to natural selection.The type best suited to the environment willeasier to survive and has higher amount.
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