Pedigrees and Inheritance

What is the purpose of pedigrees?

• To track traits in a family

• To make determinations about offspring

• To observe a family tree

• Pedigrees are not particularly usefule

Tags

NGSS.HS-LS3-1

How many generations are shown in this pedigree?

• 1

• 2

• 3

• 4

What does an open/unshaded circle represent?

• not affected male

• affected male

• not affected female

• affected female

What does a filled square represent?

• not affected male

• affected male

• not affected female

• affected female

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The physical characteristics or expression of a gene is referred to as what?

• genotype

• phenotype

• allele

• pedigree

Tags

NGSS.HS-LS3-3

The genotypes AA and Aa create the phenotype that is

• dominant

• recessive

Tags

NGSS.HS-LS3-2

The genotype aa creates the phenotype that is

• dominant

• recessive

Tags

NGSS.HS-LS3-1

Based on the pedigree shown, is the trait shown dominant or recessive?

• dominant

• recessive

Tags

NGSS.HS-LS3-1

How can pedigrees reveal a traits heredity? For example, what do we know about albinism and how it is passed on based on the pedigrees you have seen?

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If this pedigree shows a recessive disorder, what MUST the genotype of individual 4 be?

• HH

• Hh

• hh

Tags

NGSS.HS-LS3-1