Match each sex determination system or sex-linked inheritance pattern on the left with its correct biological characteristic or organism example on the right.
- XX-XO SystemObserved in insects like grasshoppers where males possess a single X chromosome () and females possess two ().
- ZZ-ZW SystemObserved in birds where females are the heterogametic sex () and males are homogametic ().
- X-linked Recessive InheritanceExpressed predominantly in males and transmitted from heterozygous carrier mothers to their sons.
- Y-linked (Holandric) InheritancePassed exclusively from an affected father to all of his sons, never affecting females.
Answer
The correct pairings are: XX-XO System matches grasshoppers with males; ZZ-ZW System matches birds with heterogametic females; X-linked Recessive Inheritance matches traits passed from carrier mothers to sons; Y-linked Inheritance matches traits passed exclusively from an affected father to all sons.
Each mechanism accurately corresponds to its characteristic biological model: XX-XO occurs in grasshoppers ( males); ZZ-ZW occurs in birds where females are heterogametic (); X-linked recessive traits pass from carrier mothers to sons; and Y-linked traits pass exclusively from fathers to sons.
Step-by-Step Solution
Key Concept
Sex Determination Systems and Sex-Linked Inheritance Patterns