generation

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generation

 [jen″er-a´shun]
1. the process of reproduction.
2. a class composed of all individuals removed by the same number of successive ancestors from a common predecessor, or occupying positions on the same level in a genealogical (pedigree) chart.
alternate generation reproduction by alternate asexual and sexual means in an animal or plant species.
asexual generation (direct generation) production of a new organism not originating from union of gametes.
first filial generation the first-generation offspring of two parents; symbol F1.
parental generation the generation with which a particular genetic study is begun; symbol P1.
second filial generation all of the offspring produced by two individuals of the first filial generation; symbol F2.
sexual generation production of a new organism from the cell formed by the union of a male gamete (spermatozoon) and a female gamete (oocyte).
spontaneous generation the discredited concept of continuous generation of living organisms from nonliving matter.

gen·er·a·tion

(jen'ĕr-ā'shŭn),
1. Synonym(s): reproduction (1)
2. A discrete stage in succession of descent; for example, father, son, and grandson are three generations.
[L. generatio, fr. genero, pp. -atus, to beget]

generation

/gen·er·a·tion/ (jen″ĕ-ra´shun)
1. reproduction (1).
2. a class composed of all individuals removed by the same number of successive ancestors from a common predecessor, or occupying positions on the same level in a genealogical (pedigree) chart.

alternate generation  reproduction by alternate asexual and sexual means in an animal or plant species.
asexual generation  production of a new organism not originating from union of gametes.
first filial generation  the first-generation offspring of two parents; symbol F1.
parental generation  the generation with which a particular genetic study is begun; symbol P1.
second filial generation  all of the offspring produced by two individuals of the first filial generation; symbol F2.
sexual generation  production of a new organism from the zygote formed by the union of gametes.
spontaneous generation  the discredited concept of continuous generation of living organisms from nonliving matter.

generation

(jĕn′ə-rā′shən)
n.
1. The people born and living about the same time, considered as a group: the baby-boom generation.
2. The average interval of time between the birth of parents and the birth of their offspring: a social change that took place over three generations.
3. All of the offspring that are at the same stage of descent from a common ancestor: Mother and daughters represent two generations.
4. Biology A form or stage in the life cycle of an organism: the asexual generation of a fern.
5. The act or process of generating; origination, production, or procreation.

gen′er·a′tion·al adj.
gen′er·a′tion·al·ly adv.

generation

[jen′ərā′shən]
Etymology: L, generare, to beget
1 the act or process of reproduction; procreation.
2 a group of contemporary individuals that have descended through the same number of life cycles from a common ancestor.
3 the period between the birth of one individual and the birth of its offspring. Kinds of generation include alternate generation, filial generation, and parental generation.

gen·er·a·tion

(jen-ĕr-ā'shŭn)
1. Synonym(s): reproduction (2) .
2. A discrete stage in succession of descent; e.g., father, son, and grandson are three generations.
[L. generatio, fr. genero, pp. -atus, to beget]

generation

1. A single stage of reproductive descent in the history of an organism.
2. The average or normal time between the birth of parents and the birth of their offspring. In humans, this may be taken to be 25 years.

generation

  1. a group of organisms of approximately the same age, usually derived from the same parents, referred to as the first filial generation (F1).
  2. the act of propagating a species or bringing about the formation of new individuals.

generation

1. the process of reproduction.
2. a class composed of all individuals removed by the same number of successive ancestors from a common predecessor, or occupying positions on the same level in a genealogical (pedigree) chart. Said also of antibiotics or other chemicals derived from parent compounds.

alternate generation
reproduction by alternate asexual and sexual means in an animal or plant species.
asexual generation
production of a new organism not originating from union of gametes. Called also direct generation.
direct generation
see asexual generation (above).
filial generation (first)
the first generation offspring of two parents; symbol F1.
filial generation (second)
all of the offspring produced by two individuals of the first filial generation; symbol F2.
generation interval
the mean age of the parents when the animals that are to replace them are born.
parental generation
the generation with which a particular genetic study is begun; symbol P1.
sexual generation
production of a new organism from the zygote formed by the union of gametes.
spontaneous generation
the discredited concept of continuous generation of living organisms from nonliving matter.
generation time
1. in epidemiological terms the time required between infection occurring and the patient reaching full infectivity.
2. in histological terms the time required to complete one full cell cycle; average of 20 hours for mammalian cells.

Patient discussion about generation

Q. Can cancer skip every other generation in your family? Can cancer be so hereditary as to skip every other generation in a family? On my dad's side of the family it seems like it does. Both my great grandmothers on my father's side had cancer (breast cancer and another type) and a great grandfather had cancer as well. My grandparents did not have cancer. My father ended up having cancer out of the three of my grandparents’ children. Me nor any of my cousins have had cancer. Is it possible any of our children will?

A. If there is a BRCA mutation, it does not skip generations. A child of a person with a BRCA mutation has a 50/50 chance of having the mutation. Those who have the mutation can pass it on. Those who do not have the mutation cannot pass it on.

Q. What alternatives are there for DDD.De generative Disc Disease? I can't sit upright for long periods of time, at times the symptoms are worse and then days and weeks where I feel fine. When I lean into my right legit alleviates it a little but it is excruciating when I shift weight. I also have to sleep with a pillow between my legs and have to shift frequently.I have a lot of strength in my legs and back. But if I stuck in my stomach more and curve my like doing a crunch. the pain is fine.

A. Degenerative disc disease can often be successfully treated without surgery. One or a combination of treatments such as Physical therapy, chiropractic manipulative therapy (CMT), osteopathic manipulation, anti-inflammatory medications such as nonsteroidal anti-inflammatory drugs, chiropractic treatments, Traction (orthopedics), or spinal injections often provide adequate relief of these troubling symptoms.
The option of surgery may be recommended if the conservative treatment options do not provide relief within 2 to 3 months. If leg or back pain limits normal activity, if there is weakness or numbness in the legs, if it is difficult to walk or stand, or if medication or physical therapy are ineffective, surgery may be necessary. You should dicucss this with an orthopedic surgeon.

Q. Hi I have pain in my knee since 3 years that I thought was generated by weight excess I've lost 28kg but the pain is still here, went to the doctor and he diagnosed a meniscus degenerated (direct translation from spanish, could be incorrect). He told me that there is nothing to do about that and that surgery won't help. My problem is that I love running and I can not do it anymore, everytime I try I start having pain in the back side of my knee and it last for days. I'd love to hear about alternatives Roberto

A. Toberro, go to a GOOD health food store and get "Comfrey ointment". Rub this on your knee 2-3 times a day and see how you feel after a month of doing this. I have cured myself of carpal tunnel to avoid surgery doing this and it has also helped me with lower back pain! If you really want to feel better, stop eating any milk or cheese products and sugar! That all contributes to inflammation which arthritis is all about! Be well! :)

More discussions about generation
References in periodicals archive ?
Prediction of genetic contributions and generation intervals in populations with overlapping generations under selection.
The effective population size and generation interval were computed using ENDOG program (Gutierrez and Goyache, 2005).
e]) and generation interval for three Chinese swine breeds are listed in Table 2.
The completeness and depth of pedigree affects the estimated inbreeding coefficients and relationships among animals directly, and which also affects the estimated generation intervals and effective numbers of founders and ancestors to a certain extent (Stachowicz et al.
4, assuming a short generation interval of 3 days, and 1.
Latency and infectious periods can be summed into a single statistic called the generation interval, which measures the interval between disease onset in 2 successive cases.
The method has a natural real-time implementation in which 1) a first estimate of the reproduction number is available after a lag that depends on the generation interval, and 2) while the epidemic goes on, the estimate is consolidated, and its credible interval narrows.
We also evaluated the effect of the length of the generation interval on the results.
The estimation procedure depends on 3 assumptions: 1) ascertainment of patients whose symptoms appear before day T is complete, 2) transmission events are independent, and 3) the generation interval, the time from symptom onset in a primary case to symptom onset in a secondary case, has a known frequency distribution.
The average generation interval was calculated by averaging the ages of sires and dams when the calves were born (Falconer, 1996).
Average age of sires and dams and the generation interval CHPPT Birth year Sire Dam Mean Mean (1) 5.
We are pleased another Charolais bull has been selected for the latest YBPS, which is designed to promote rapid genetic improvement by reduced generation intervals and improved selection differential," said BCCS chief executive, David Benson.

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