patterns of inheritance. vocabulary incomplete dominance: 1 allele only partially dominant...

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Patterns of Inheritance

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Page 1: Patterns of Inheritance. Vocabulary Incomplete dominance: 1 allele only partially dominant Co-dominance: both alleles for genes exposed equally Multiple

Patterns of Inheritance

Page 2: Patterns of Inheritance. Vocabulary Incomplete dominance: 1 allele only partially dominant Co-dominance: both alleles for genes exposed equally Multiple

Vocabulary

• Incomplete dominance: 1 allele only partially dominant

• Co-dominance: both alleles for genes exposed equally

• Multiple alleles: 3 or more possible alleles determine trait

• Polygenetic inheritance: more than 1 gene effects trait

Page 3: Patterns of Inheritance. Vocabulary Incomplete dominance: 1 allele only partially dominant Co-dominance: both alleles for genes exposed equally Multiple

Incomplete dominance• Red snapdragons crossed with white• Pink snapdragons• Two white- WW• RR- red• Capital letters- neither totally dominant• RW- only a little red, a little white• Appear pink

Page 4: Patterns of Inheritance. Vocabulary Incomplete dominance: 1 allele only partially dominant Co-dominance: both alleles for genes exposed equally Multiple

Co-dominance

• Neither allele dominant• Black, white chickens• All chickens have black, white

feathers• FB- black feathers• FW- white feathers• F- fathers• Superscripts- tells you color

feathers

Page 5: Patterns of Inheritance. Vocabulary Incomplete dominance: 1 allele only partially dominant Co-dominance: both alleles for genes exposed equally Multiple

Multiple Alleles• 3 or more possible alleles determine trait• Rabbits coat color ranges brownish gray- all white• Depends on alleles inherited• Leads to differences among siblings

Page 6: Patterns of Inheritance. Vocabulary Incomplete dominance: 1 allele only partially dominant Co-dominance: both alleles for genes exposed equally Multiple

Polygenetic inheritance• Alleles different genes work together produce trait• Broad range phenotypes• Human height• Plant flowering time

Page 7: Patterns of Inheritance. Vocabulary Incomplete dominance: 1 allele only partially dominant Co-dominance: both alleles for genes exposed equally Multiple

Acquired Traits• Inherited

-Vocal cords

-Height

-Hair color• Acquired

-speak languages

-callus on finger- writing

-haircut