Section 14.1 & Review. Punnett Squares Dihybrid Crosses Karyotypes Pedigrees. Section 14.1 – Human Chromosomes. Objectives What is a karyotype? What patterns of inheritance do human traits follow? How can pedigrees be used to analyze human inheritance? Define Genome Karyotype
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If a woman is a carrier of an X-linked recessiveallele for a disorder and her mate does not haveit, their boys will have a 50% chance of inheritingthe disorder. None of their girls will have it, buthalf of them are likely to be carriers.
If a man has an X-linked recessive disorder and hismate does not carry the allele for it, all of their girlswill be carriers. None of their boys will inherit theharmful allele. Only girls receive X chromosomesfrom their fathers.