Chapter 7 Pedigrees and Karyotypes Flashcards
What is a pedigree?
A family tree of traits.
On a pedigree what does a square represent?
A male
On a pedigree what does a circle represent?
A female
On a pedigree what does it mean when the shape is filled in completely?
That individual expressed the trait
On a pedigree what does it mean when a shape is partially filled in?
That individual is a carrier of the trait
What can you concluded when a pedigree shows that only men are expressing the trait.
That the trait is sex linked and the females are carriers
What can you conclude when the female offspring shows the trait but neither parent does?
THat the trait is not sex linked, it must be autosomal (Carried on one of the other 22 pair of chromosomes) And that both parent were carriers.
What type of chart show pictures of homologous chromosomes pairs?
Karyotype
What 2 thing can easily be seen from a karyotype?
Chromosomal disorders and gender
