8A-Inheritance

Question 1

MOnohybrid corss

Answer 1

examines then inheritance of one trait

Question 2

Punnet square

Answer 2

used to repersent the outcome of the crosses

Question 3

linked genes

Answer 3

when 2genes are on the same chromsome located close togehter and USUALLY inheritied together—-i

Question 4

how do you know if genes are linked

Answer 4

if theres a high percetnage in one area and a low percentage in another area the genes are linked, but if the genes are relaitlvey the same percetnage then their not linked

Question 5

genes

Answer 5

a specific section of DNA that carries the codes for proteins

Question 6

sex linked inheritance

Answer 6

a trait found in the sex chromosm eg, eye colour blidnl ess

Question 7

sex linked inheritance

Answer 7

a trait found in the sex chr omosm eg, eye colour blidnless

Question 8

During the creation of an oocyte, 3 additional haploid cells are created that will not be fertilized, these cells
are called

Answer 8

polar bodies

Question 9

test cross

Answer 9

used to determine whether an individual with the dominant phenotype is homogozogus or heterzogous for the trait eg. plants that have round seeds can either be RR or Rr

Question 10

linked genes what are they

Answer 10

genes located close together on the same chromsome that are usualy inheritred toghet
er

Question 11

If a person was homozogus for I^A alleles and they hda children with a peraosn with A lood,could they have a cild with lood type O . Explain

Answer 11

No, because neither parent carry the recessive allele(i) to produce loodtype o(ii)

Question 12

what does it mean when a pedigre chart is X linked domiant

Answer 12

fathers dont pass the disease to their sons, and all daughters of affected fathers have the conditon

Question 13

what does it mean when in a pedigree chart it is autosomal rescceisve

Answer 13

resccive because it doenst not occur in every generation nad austomsla because it occurs in both females nad males equally

Question 14

what does it mean in a pedogree chart if it is sex linked resccive

Answer 14

males are affected from carrier mothers and greatneion is skiped a generation

Question 15

wHAT DOES it mean to be austomal domiannt

Answer 15

Phenotype appeares in every generaiton, affected indivudlas have atleast one offspring

Question 18

what does it mean to be x linked rescicve

Answer 18

Trait is not passed from mother to son,
more males are affected then feamles nad

Question 19

How is a test cross perfomred

Answer 19

performed by crossing an indiviudal wth dominant the phenotype to a recessive individaul eg. purple flower wiht white flower

Question 20

What are the expceted outcomes of a tes corss

Answer 20

if purple flowers were crosswith white nad and if in this case 100% of the offspring in the cross would be purple then the parent would have the genotupe of PP. But if only 50% of the offpsring were purple nad 50% were wite then the parent would have a genotype of of Pp because they carry the recessvie tritat

Question 21

differnetiante between autosmal pedigreee and sex linked pedigree

Answer 21

an autosomal pedigree will always have an equal amount of females and males whereas sex linked will not have an equal amount of females and males