inheritance

Question 1

Male fruit flies are more likely than female fruit flies to have white eyes.

Answer 1

males only need one recessive allele, females need 2 recessive alleles

Question 2

explain the results of autosomal linkage

Answer 2

• genes are linked by autosomal linkage
  -no meisosis
• GL are linked and gl are linked

Question 3

In genetic crosses, the observed phenotypic ratios obtained in the offspring
are often not the same as the expected ratios.
Suggest two reasons why.

Answer 3

• small sample size
  -random fertilisation of gametes

Question 4

what is the expected ratio without autosomal linkage

Answer 4

9:3:3:1