7.4 Human Genetics and Pedigrees TEKS 6F, 6H The student is expected to: 6F predict possible outcomes of various genetic combinations such as monohybrid.

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7.4 Human Genetics and Pedigrees TEKS 6F, 6H The student is expected to: 6F predict possible outcomes of various genetic combinations such as monohybrid crosses, dihybrid crosses and non Mendelian inheritance and 6H describe how techniques such as DNA fingerprinting, genetic modifications, and chromosomal analysis are used to study the genomes of organisms

7.4 Human Genetics and Pedigrees TEKS 6F, 6H KEY CONCEPT A combination of methods is used to study human genetics.

7.4 Human Genetics and Pedigrees TEKS 6F, 6H Human genetics follows the patterns seen in other organisms. The basic principles of genetics are the same in all sexually reproducing organisms. –Inheritance of many human traits is complex. –Single-gene traits are important in understanding human genetics.

7.4 Human Genetics and Pedigrees TEKS 6F, 6H Females can carry sex-linked genetic disorders. Males (XY) express all of their sex linked genes. Expression of the disorder depends on which parent carries the allele and the sex of the child. X Y

7.4 Human Genetics and Pedigrees TEKS 6F, 6H A pedigree is a chart for tracing genes in a family. Phenotypes are used to infer genotypes on a pedigree. Autosomal genes show different patterns on a pedigree than sex-linked genes.

7.4 Human Genetics and Pedigrees TEKS 6F, 6H If the phenotype is more common in males, the gene is likely sex-linked.

7.4 Human Genetics and Pedigrees TEKS 6F, 6H Several methods help map human chromosomes. A karyotype is a picture of all chromosomes in a cell. X Y

7.4 Human Genetics and Pedigrees TEKS 6F, 6H Karyotypes can show changes in chromosomes. –deletion of part of a chromosome or loss of a chromosome –large changes in chromosomes –extra chromosomes or duplication of part of a chromosome