Differenate between homology and analogy. Give one example of each. (b) what is a test cross? How can it decipher the heterozygosity of a plant?
Answers
homology means the structure which are different in appearance and perform different functions but have similar basic structure and developmental origin are called homology . e.g . four limbs in vertebrates.: four limbs in vertebrates like bats, birds look different perform different functions . but they are built on pentadectyl plan. ANALOGY:- ANALOGY ARE THOSE STRUCTURES WHICH ARE DIFFERENT IN BASIC STRUCTURE AND DEVELOPMENTAL ORIGIN BY APPEAR SIMILAR AND PERFORM SIMILAR FUNCTION . THIS RELATIONSHIP BW STRUCTUTRE OF DIFFERENT GROUP OF ANIMALS OF SEPARATE LINE AGE DUE TO SIMILAR FUNCTION IS CALLED ANALOGY. example are wings of birds :- these are different in basic anatomical origin e.g. insect wings are formed from integument while bird wings are modified fore limbs.. (B) TEST CROSS :- THE TEST CROSS IS THE CROSS IN WHICH F1 GENERATION IS CROSS WITH ONLY THE HOMOZYGOUS RECESSIVE PARENT.. CROSS Tt × tt then f1 is Tt and tt and its genotypic ratio is 1:1 and phenotypicx ratio is hybrid tall × pure dwarf............♡♡♡♡♡♡ HOPE THIS HELPS UU ♡♡♡♡♡ MARK MY ANS AS THE BRAINLIEST ONE PLZZZZZZ ITS MY REQUEST ♡♡♡♡♡