Unit 5 and 6-Patterns of Inheritance

Question 1

Sex-Linked

Answer 1

traits on the X chromosome that are often more common in males

Question 2

Multiple Alleles

Answer 2

more than two alleles for a gene

ex. fur color

Question 3

Codominance

Answer 3

both traits are fully and separately expressed
Two dominant alleles are expressed equally or fully
(EX. SPECKLED FLOWERS)

Question 3

Polygenic Inheritance

Answer 3

• trait produced by two or more genes

- more than one gene determines a trait

Question 4

Incomplete dominance

Answer 4

(PINK FLOWER)
two dominant alleles blend forming an intermediate phenotype (BLEND MIX)
neither allele is completely dominant or recessive.

Question 5

A disorder or trait that affects the “X” chromosome will disproportionately affect more

Answer 5

Males cause XY=male

Question 6

Being a carrier indicates that this genetic disorder is what type of inheritance pattern?

Answer 6

autosomal recessive or sex-linked disorder

Question 7

if a flower is expressing “codominance’

Answer 7

SPECKLED Both the dominant and recessive traits would be expressed so that the flower might look speckled or striped

Question 8

If a pea plant has a recessive allele for green peas, it will produce

Answer 8

Green peas if it does not also have a dominant allele for yellow peas

Question 9

Variation in many human traits are due to __ inheritance.

Answer 9

polygenic- trait produced by two or more genes

Question 10

codominance

Answer 10

speckled flowers

Question 11

Pedigree-Autosomal Recessive Disorders

Answer 11

• -(aa) the presence of 2 recessive alleles on autosomes
• -male=female likelihood
• -skips generations
• -rare

Question 12

Pedigree autosmal dominant disorders

Answer 12

• -(AA) presence of 1 dominant allele on autosomes
• -males=females
• NEVER skips a generation
• a child cannot inherit the disease if both parents are healthy
• -common

Question 13

Pedigree sex-linked disorders

Answer 13

• -the presence of allele on the X sex chromosome (recessive)
• -skips generations
• MALE MORE OFTEN
• affected fathers do not pass on to sons (cause sons get the Y allele from them not X)
• -rare

Question 13

Pedigree sex-linked disorders

Answer 13

• -the presence of allele on the X sex chromosome (recessive)
• -skips generations
• MALE MORE OFTEN
• affected fathers do not pass on to sons (cause sons get the Y allele from them not X)
• -rare