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Transcript
Heredity • Passing of traits from parent to offspring. What are traits? • Traits are characteristics that you inherit. • Can be easily observable like eye color or “invisible” like your blood type What controls traits? • Traits are controlled by genes. • Genes are segments (pieces) of DNA. • Genes are found on chromosomes. • Genes are passed from parents to offspring – 1 copy from each parent Dominant and Recessive • Each gene in a pair is an allele • Offspring inherit one allele from each parent • The allele that shows if present is called dominant • The allele that is often masked (covered up) is called recessive Common traits that are inherited. • Detached earlobe Attached Detached (free) Common traits that are inherited. • Rolled tongue. Common traits that are inherited. • Dimples Common traits that are inherited. • Curly hair • If you have wavy hair then say YES for curly • If you STRAIGHTEN your hair, but it’s normally curly/wavy, then say YES Common traits that are inherited. • Cleft chin Common traits that are inherited. • Hand clasp. Common traits that are inherited. • Widows peak. Common traits that are inherited. • Bent thumb (hitchhikers thumb) Common traits that are inherited. • Finger hair.
