Transcript Trait Survey_rev2014

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.