1. 14-1: Human Heredity Biology 2

2. Of all living things that inhabit this world, we are most interested in us (Humans) Scientists know much less about humans than other species Introduction

3. Scientists photograph cells during replication, when chromosomes are easy to see – Use these pictures to make karyotypes KARYOTYPE: photograph of chromosomes grouped in order in pairs Human Chromosomes

5. Humans usually have 23 pairs of chromosomes – – 1 set from mom, 1 set from dad – Total # of chromosomes = 46 Each pair is numbered 1-23, biggest to smallest – Pair # 23 are sex chromosomes Human Chromosomes

6. PEDIGREE: chart that shows the relationships within a family Pedigree is like a family tree – Shows traits inherited in families Human Traits