Answer:
Failure of chromosome to separate
Explanation:
The main essence of meiotic division is to form daughter cells with a reduced number of chromosomes that will maintain the correct chromosomal number in an organism. This is achieved when chromosomes separate during gamete formation (meiosis) to produce haploid (n) gametes.
However, a case may arise whereby chromosomes fail to separate during the anaphase stage of meiosis. This case is referred to as MEIOTIC NON-DISJUNCTION. As meiosis occurs in two stages i.e. meiosis I and II, so does meiotic nondisjunction. It can occur in meiosis I, where homologous chromosomes fail to separate or meiosis II, where sister chromatids fail to separate.
If it occurs in meiosis I, Two gametes will have a n-1 chromosome number i.e. one chromosome is missing while Two other gametes will have n+1 chromosome number i.e. one extra chromosome is added.
If it occurs in meiosis II, two normal haploid gametes (n) will be produced while the other two will have a n+1 and n-1 chromosome number respectively.
When these abnormal gametes (n+1, n-1) fuses with a normal gamete (n), the resulting organisms possess a chromosomal anomaly called ANEUPLOIDY i.e. a disorder in chromosomal number. The organisms will have 47 and 45 chromosomes depending on whether n+1 or n-1 gametes is involved respectively.
Answer:
Uniform spacing patterns in plants such as the creosote bush are most ofthen associated with d. competitive interaction between individuals of the same population
Explanation:
Distribution patterns or spacing patterns mean the way the individuals in a population are distributed in space at a given time. These organisms can be more or less equally spaced. Randomly disperse means there is no predictable pattern, and clustered in groups means the dispersion is clumped. In this case, these plants have uniform spacing patterns and are most often associated with competitive interaction between individuals of the same population.
The invasive species are the species who are present in a non native ecosystem. The invasion of These species disturbs the environment of particular system by increasing the competition or destroying the vital component of the ecosystem.
The invasive species can increase the competition in the native species, which would lead to the decrease in the number of the native species. There are many species present in the Hawaii department of the agriculture that are endangered, the competition cannot be tolerated here, as it can lead to the extinction of the endangered species present. So, in order to reduce the chance of the extinction due to competition, Hawaii department of Agriculture is very strict about the prevention of the non native or invasive species.
Answer:
list 3 limiting factors How can it limit a population?
Explanation:
Answers no
Answer:
A. Results in genetically identical offspring.
Explanation:
In as3xual reproduction the offspring is genetically identical to the parents, whilst in s3xual reproduction the offspring comes out with some traits of their parents but they are different from their parents.
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