Biology : Principles of Inheritance and Variation

Phage genome site on bacterial chromosome resulted in the structure

• Nucleic acid

• Heterocyst

• Prophage

• None of these

A point mutation where guanine is replaced by cytosine is also called

• Frameshift mutation

• Transition mutation

• Translocation mutation

• Transversion mutation

During meiosis-I, the bivalent chromosomes clearly appear as tetrads during

• Diakinesis

• Diplotene

• Pachytene

• Zygotene

Tow genes R and y are located very close on the chromosome linkage map on maize plant. When RRYY and rryy genotypes are hybridized, then F₂ segregation will show

• Higher number of the recombinant types

• Segregation with expected 9:3:3:1 ratio

• Segregation is 3:1 ratio

• Higher number of the parental types

In animals normally which organism has a maximum number of chromosomes?

• Butterfly

• Elephant

• Hermit crab

• Chimpanzee

Chromosomes are arranged along the equator during

• Prophase

• Metaphase

• Anaphase

• Telophase

The mobile genetic element is

• Transposon

• Mutation

• Endonuclease

• Variation

Given below is a sample of portion of DNA strand given the base sequence on the opposite strand. What is so special show in it?

5’−GAATTC….3’

3’−CTTAAG … 5’

• Detection mutation

• Start codon at 5′ end

• The palindromic sequence of base pairs

• Replication completed

 Development of an embryo without fertilization is called as

• Apomixis

• Polyembryony

• Parthenocarpy

• Parthenogenesis

A fern differs from a moss in having

• Swimming archegonia

• Swimming antherozoids

• Independent gametophytes

• Independent sporophytes