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Mor
Genetics MOR
Cell division in plants is a process that is currently under intense study by biologists. One team of researchers in Australia has recently published a paper describing their research into the role that microtubules play in cell division and morphogenesis. While these structures have been identified to be involved in cell division and growth, how they form, disassemble, and reappear is not fully understood. The Australian team's research consisted of their testing the hypothesis that a gene in the plant A. thaliana, called mor 1, plays a role in the development of microtubules.
In order to test this hypothesis, the team determined that the mor1 locus in a mutant A. thaliana caused temperature sensitive mutations in the development of microtubules when the temperature was increased from 21?C to 29?C. They used immunofluorescence microscopy, a technique that stains cell structures with a fluorescent dye, to visualize the actual microtubules of both wild type and mutant A. thaliana...
The mutant A thaliana, were determined to contain two mutant alleles, each having "single amino-acid substitutions in the HEAT repeat nearest the N. terminus." (Whittington 611) When exposed to temperatures of 29 ?C for a period of 90 minutes, the mutant samples displayed non-transverse orientation and "patchy diffuse fluorescence developed…eventually the microtubules became relatively short, sparse, and misaligned…" (Whittington 611) Normal microtubule organization returned to the mutant samples quickly after lowering the temperature back to 20?C.
The researchers also grew wild and mutant seedlings of A. thaliana and observed that when raised in an environment of 29?C, the mutant plants were "extremely squat, do not develop flowers and eventually die." (Whittington 612) This result reinforced the hypothesis that two alleles within the mor1 gene contain mutations which confer temperature sensitivity to the formation of microtubules within the plant's cells. In other words,…
References
Whittington, Angela, et al.. "MOR1 is Essential for Organizing Cortical Microtubules
in Plants." (31 May, 2001). Nature 411, 610-613. Retrieved from www.nature.com
Genetics and Development Genetics is a scientific discipline that deals with how individuals inherit their physical and behavioral attributes. Generally, genetics is a branch of biology that deals with the science of heredity, genes, and differences in living organisms. It's the process with which a child inherits traits from his/her parents and the molecular organization and function of genes. The question of what determines the development of a child has been
Genetics and Development: As a discipline of biology, genetics is basically considered as the science of genes, inheritance, and differences in living organisms. Since genes are common characteristics in living organisms, genetics is used in the study of all living systems including plants, humans, domestic animals, bacteria, and viruses. Generally, this biological discipline focuses on the molecular structure and operation of genes whose behaviors are in the context of organisms or
Hence, genetic factors underlie the stability or continuity of psychological traits. Gene Development Mutations play a vital role in genetics, although they cause different disorders living things. Sometimes heredity causes disorders that affect the normal genetic development. Genetic processes control how humans develop from a single cell to adult human beings. Genes control the nervous system cells, and re-growth of skin and hair cells. Genes make humans dynamic organisms capable of
The information is then transcribed into the traits and phenotypes of the offspring depending on the dominance and recessive alleles within the gene (Berg, Tymoczko, & Stryer, n.d). The egg is fertilized by the sperm from the mother and their nuclei fuses together to form a zygote. The zygote contains 23 chromosomes from the mother and 23 from the father. From this combination of genes and the environmental conditions
Genetics Student Response Original DNA Strand: 3'-T ACCCTTTAGCCACT-5' Transcription (base sequence of RNA): 3'-A UGGGAAAUCGGUGA-5' Translation (amino acid sequence): Met -- Gly -- Asn -- His -- Arg -- STOP Mutated gene sequence one: 3'-T ACGCTTTAGCCATT-5' Transcription (base sequence of RNA): 3'-A UGCGAAAUCGGUAA-5' Translation (amino acid sequence): Met -- Arg -- Asn -- His -- Arg -- STOP Mutated gene sequence two: 3'-T AACCTTTACTAGGCACT-5' Transcription (base sequence of RNA): 3'-A UUGGAAAUGAUCCGUGA-5' Translation (amino acid sequence): Ile -- Gly -- Asn -- Asp -- Pro-STOP What is the significance of the
Genetics Original Gene Sequence: 3'-T AC CC T. TT AGTAGCCAC T-5 Transcription of Original: 3'-A UG GG A AA UCAUCGGUG A-5' Translation of Original: Start codon Met, Gly, Asn, His, Arg, Stop Mutated Gene Sequence 1: 3'-T ACGCT TT AGTAGCCAT T-5' Transcription of Mutated 1: 3'-A UGCGA AA UCAUCGGUA A-5' Translation of Mutated 1: Start codon Met, Arg, Asn, His, Arg, Stop Mutated Gene Sequence 2: 3'-T AACCT TT ACTAGGCAC T-5' Transcription of Mutated 2: 3'-AUUGGAAAUGAUCCGUGA Translation of Mutated