Answer:
Your answer is A. Individual #8 must be heterozygous for the trait.
Step-by-step explanation:
So the way a Pedigree Diagram works is vertical lines extending downward from a couple represent their offspring. The oldest individuals are found at the top of a pedigree, with each subsequent generation occupying the next level below.
When analyzing the pattern of inheritance of a particular trait, it is common to shade in the symbol of all individuals that possess that trait.
•If a parent is homozygous, having two of the same type of alleles for a given trait, all of the offspring inherit that allele.
•If a parent is heterozygous, the offspring each have a 50/50 chance of inheriting either allele from that parent.
<em>Dominance determines if a given trait is exhibited by an organism.
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•In complete dominance, the presence of a dominant allele (in either genotype: XX or Xx) means the phenotype of the organism is the dominant trait.
•If only recessive alleles are present (xx), the phenotype of the organism is the recessive trait.
