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How can I solve genetic problems without using punnet square? how can i know the ratio...

How can I solve genetic problems without using punnet square? how can i know the ratio espically in trihybrid cross? for example

can someone solve it and elaborate ?

In humans, "unattached" earlobes are dominant over "attached" earlobes. "Widows peak" hairline is dominant over "non-widows peak" hairline. Use E and e for the earlobe phenotype alleles, and W and w for the hairline phenotype alleles. A female and a male, both with unattached earlobes, have a child with attached earlobes. What is the probability their next child will have attached earlobes?

A) 4/4 B) 3/4 C) 2/4 D) 1/4 E) 0

A female and a male, both with genotype EeWw have a child. What is the probability it will have attached earlobes and a widows peak hairline?

A) 9/16 B) 3/16 C) 1/16 D) 1/3 E) 3/4

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