Autosomal Linkage

Question 1

Autosome

Answer 1

any chromosome which isn’t a sex chromosome

Question 2

key point about genes on an autosome:

Answer 2

• genes on the same autosome are linked

- so they will stay together during independent assortment (so will be inherited together)

Question 3

homologous pairs have

Answer 3

• same genes

- different alleles

Question 4

what is affected by autosomal linkage? why?

Answer 4

• the expected phenotypic ratio is affected because genes are inherited together
• therefore they behave more like a monohybrid cross (3:1)

Question 5

autosomal linkage means offspring have the same genotype and phenotype as parents.
what causes the exception here:

Answer 5

crossing over:

• majority of offspring will have same geno + pheno
• some will have diff because of crossing over

Question 6

the closer the locus of 2 genes on an autosome

Answer 6

the more closely linked they are