Development of an embryo without fertilization is called as
Apomixis
Polyembryony
Parthenocarpy
Parthenogenesis
D.
Parthenogenesis
Parthenogenesis (virgin origin) is the development of an embryo from an unfertilized egg or if a spermatozoan does penetrate the egg, there is no union of male and female pronuclei. It is found in many plants (dandelions and hawk weeds) and (aphids and honey bees).
A point mutation where guanine is replaced by cytosine is also called
Frameshift mutation
Transition mutation
Translocation mutation
Transversion mutation
A fern differs from a moss in having
Swimming archegonia
Swimming antherozoids
Independent gametophytes
Independent sporophytes
During meiosis-I, the bivalent chromosomes clearly appear as tetrads during
Diakinesis
Diplotene
Pachytene
Zygotene
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
In animals normally which organism has a maximum number of chromosomes?
Butterfly
Elephant
Hermit crab
Chimpanzee
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
Phage genome site on bacterial chromosome resulted in the structure
Nucleic acid
Heterocyst
Prophage
None of these
