Give a characteristic of heterozygous type

Heterozygous refers to having different alleles for a particular trait.

When alleles are heterozygous in complete dominance inheritance, one allele is dominant and the other is recessive.

The genotypic ratio in a heterozygous cross where both parents are heterozygous for a trait is 1:2:1.

Explanation:

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in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation:

is it multiple choice?