STD 11 - 19. Chemical coordination and integration — NEET STD 11 Science — Question

Delete odd one for frog.

Study the below given statements and choose the correct statements with respect to linkage and recombination ?
(i) Morgan carried out several dihybrid crosses in Drosophila to study genes that were sex-linked.
(ii) Linkage is the phenomenon, where two or more linked genes are always inherited together and their recombination frequency in a test cross progeny is less than 50%.
(iii) All the genes present on one chromosome form a linkage group and its number in organism is equal to haploid number of chromosomes.
(iv) When two pairs of traits are combined in a hybrid, segregation of one pair of characters is independent of the other pair of characters.
(v) In Drosophila genes for white and yellow were very tightly linked and showed only 1.3 percent recombination.
(vi) In Drosophila genes for white and miniature wing showed 37.2 per cent recombination.

Given below are two statements
Statement I :
Many bony fishes are ammonotelic while mammals are ureotelic.
Statement II :
Reptiles are uricotelic while birds are ureotelic.
Choose the correct answer from the option given below:

Corals belong to the phylum

Statement I: Ciliary movement helps in the swimming of spermatozoa maintenance of water current in the canal system of sponges and in locomotion of protozoans like euglena.
Statement II: Muscle is a specialised tissue of endodermal origin.

Interferon is

Haemozoin is a

Which of the following statements about methanogens is not correct?

Which of the following is the vestigial organs of man?