Question

7. Why would it be important to know the possible genotypic and phenotypic ratios of different genetic crosses

Answer 1

The phenotype ratio predicted for dihybrid cross is 9:3:3:1. Of the sixteen possible allele combinations: Nine combinations produce offspring with both dominant phenotypes. Three combinations each produce offspring with one dominant and one recessive phenotype.
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A Punnett square can be used to predict genotypes (allele combinations) and phenotypes(observable traits) of offspring from genetic crosses. A testcross can be used to determinewhether an organism with a dominant phenotype ishomozygous or heterozygous..

Answer 2

Answer:

Genotype is the *genetic make-up * of an organism . It describes about the nature of each allele .

Phenotype is the morphology of an organism .

Explanation:

The genotype is expressed as phenotype when the information encoded in the genes is used to make protein and RNA molecules.

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