alleryStart learning →Test crosses cannot be used on people. Which method do geneticists use instead to follow a human genetic disease?
AKaryotype counting
BRecombination mapping
CReciprocal crossing
DPedigree analysis
Answer & Solution
Correct answer: D. Pedigree analysis
1. Arranging a cross in humans is unethical and impractical.
2. Geneticists instead use pedigree analysis to study the inheritance pattern of human genetic diseases.
3. A pedigree records who is affected across the generations of a family.
4. Karyotyping counts chromosomes rather than tracking a single allele through a family.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 12 "Mendel's Experiments and Heredity", section 12.2 Characteristics and Traits_
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