Pedigree and Sex-Linked Practice

What do we use pedigrees for?

• To look at families
• To make determinations about the offspring
• To track traits in families
• Nothing

Tags

NGSS.HS-LS3-1

In a pedigree, which shape represents a male?

• circle

• square

Which sex has an X and a Y chromosome?

• male

• female

On a pedigree, this symbol represents a/an ----

• unaffected male.

• unaffected female.

• affected male.

• affected female.

How many individuals are there in the 3rd generation?

• 1

• 2

• 4

• 6

Tags

NGSS.HS-LS4-2

How are individuals III-2 and II-4 related?

• Brother and sister

• Dad and daughter

• Uncle and niece

• Grandfather and granddaughter

Tags

NGSS.HS-LS3-1

What is the mode of inheritance for this trait?

• Recessive

• Dominant

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

On this pedigree, the allele for curly hair is dominant. The couple labeled 2 both have curly hair, but have a daughter who does not have curly hair. Therefore, we can tell from the chart that for the couple labeled 2 -

• the male is heterozygous and the female is heterozygous.

• the male is homozygous recessive and the female is homozygous dominant.

Tags

NGSS.HS-LS3-1

How many generations are shown in this pedigree?

• 1
• 2
• 3
• 4

Is this trait (the shaded individuals) dominant or recessive?

• dominant
• recessive

Tags

NGSS.HS-LS3-1