How are new alleles created? Occasionally, DNA mutations occur in germ cells – cells destined to become eggs or sperm. In this case, the DNA mutation is copied into every new cell of the growing embryo following fertilisation. ... If the mutation affects a gene, it will result in a new version of that gene – a new allele.
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Because a food chain is very limited and only follows one path while a food web consists of many food chains made into one food web
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I think A. The number of cacti, flowering shrubs, and desert trees that could grow during an extended dry period.
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