Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Heteromorphic Types - Intra specific Incompatibility
Plants of the same species produce flowers that differ in morphology. This involves two (distyly) or three (tristyly) morphologically distinct types of flowers showing similar breeding behavior (mating type) within a species. The difference in the mating types lies in the position of stigma and anthers (heterostyly). Distyly is under the control of a single gene complex with two alleles, S (for short style-dominant) and s (for long style-recessive). Long style individuals are, therefore, homozygous recessive (ss) and short style are heterozygous (Ss). This ensures approximately equal ratio of short and long-styled individuals from compatible crosses.
Tristyly refers to three floral morphs with individuals having either long, mid- or short- styled flowers. Each type has stamens of two heights corresponding to the height of stigma in the other two forms. Successful pollination results only between forms having stigma and stamens of the same height. Two genes, M and S with two alleles each control tristyly. Gene S is epistatic to M. Homozygous recessive for both the genes (ssmm) determine long style, mid-style have ssMM or ssMm and short-styled flowers carry the genes SsMm or Ssmm or SsMM. In both di- and trimorphic forms sporophytic incompatibility operates.
what are some of the human needs??
Explain the Bioavailability of Folate? Bioavailability of folate from naturally occurring food sources is variable and frequently incomplete, as mentioned earlier in the food
main subdivision of phylum chordata
CELL WALL Discovered by Robert Hooke , 1665 when he saw dead empty cork cells. Bonne r - studied the chemical nature of cell wall. The cell wall is a rigid & prote
Categories of Gifted Species This group of nitrogen fixers has been divided into three categories: Rhizobium which includes fast growing species, Bradyrhizobium which
Oxygen Dissociation Curves The oxygen content of blood fully saturated or oxygenated can be calculated. It is known as the oxygen capacity of blood and this varies for differe
True or false? It would be difficult to assess whether the drug-susceptible or drug-resistant phenotype in a population of Mycobacterium tuberculosis was more fit in an environment
How much Minerals should be taken for management of obesity? A diet high in sodium may promote retention of fluid in the body. Moderate restriction in the use of common/table s
What is Palliative Outflow Patch ? Brock described closed pulmonary valvotomy and infundibular resection using a punch on a beating heart. When both pulmonary arteries are not
Identify three ways that bacteria can be transmitted from person to person. Diseases affecting nerves contain botulism and tetanus; diseases affecting the intestine include sa
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd