Variation in Heredity

Question 1

Mendel research

Answer 1

• Mendel’s research involved the crossing of what he called “typical plants” with “atypical plants”
• “Typical” being homozygous dominant
• “Atypical” being homozygous recessive
• Mendel discovered what we called complete dominance

Question 2

Complete Dominance

Answer 2

• the dominant allele’s phenotype is expressed even if the genotype is heterozygous
• a domaint allee express and resseive is masked

Question 3

Variation in Inheritance

Answer 3

• Not all traits follow complete dominance
• Examples include:
  Incomplete Dominance
  Codominance

Question 4

Incomplete Dominance

Answer 4

• neither allees are domaoint, they will create a blend
• allees dont mask eachother
• C^R and C^W

Question 5

Codominance

Answer 5

• when 2 allees compete for dominance
• they mask eachother and diff places
• Both are dominant, so both hair colours appear

Question 6

Blood types

Answer 6

• inherited through both a completely dominant and codominant pattern
• 4 major blood types: A, B, AB and O
• Blood cells have maker (A maker, B maker, both or none)

Question 7

Blood type genotype and sugar

Answer 7

Type A: I^A I^A or I^A i
sugar: one type

Type B: I^BI^Bor I^Bi
sugar: one type

Type AB: I^A I^B
sugar: two types

Type O: ii
sugar: no sugar

Question 8

Codominance and Dominance
in blood

Answer 8

IA and IB alleles are codominant to each other
IA and IB are completely dominant to the i allele

A=B>O

Question 9

RH

Answer 9

Rh + has proteins- dominant
Rh - has no preotein- ressesve

Question 10

blood type allees

Answer 10

• inherrited through 3 possible alleles: IA, IB and i
• Each of these allele codes for a different enzyme
• places different types of sugars on the surface of red blood cells