The correct answer is option A. Carrying the genetic code and determining an organism's structure and function are the functions of DNA. It is the hereditary material in almost all other organisms. The information in a DNA is stored as codes that is composed of chemical bases.
The discarded theory of blending inheritance most closely resembles incomplete dominance.
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What is blending inheritance?</h3>
- An antiquated biological notion from the 19th century is the concept of blending inheritance.
- According to the hypothesis, children inherit any trait by averaging the values of their parents for that trait.
- According to the theory of blended inheritance, an offspring combines the values of both parents for a given attribute.
- As opposed to blended inheritance, particulate inheritance states that a child inherits individual units or genes from each parent.
- Offspring thus combines the traits of both parents.
- Incomplete dominance is the term used to describe phenotypic "blending" of two features, which implies that neither trait is truly dominant over the other.
- The manifestation of phenotypic traits that are intermediate between those of the parents, such as pink flower color from red and white parents.
- Inheritance was a now-discredited hypothesis that claimed children's genetic make-up was a pure admixture of their parents'.
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Answer:
C) When common lands are protected, land degradation slowly disappears.
Explanation:
The correct option is B: MAJOR DIVISIONS IN THE SEDIMENTARY ROCK LAYERS.
Geologic time scale refers to a system of chronological dating which relates geological strata to time. Geologic time scale is used by scientists to describe the timing of the events that had occurred in the past, thus the scale divides the earth history into units of varying magnitude. There are four basic block of time, these are eons, eras, periods and epochs.
In determine geological time, rock records provide evidence of past geological events and life forms.
Answer:
Explanation:
Meiosis is a form of cell division that occurs in the sex cells of organisms. It ensures the reduction of a diploid cell to an haploid cell to allow for the formation of a diploid zygote after fertilization (contribution of both parents haploid sex cells to give a diploid zygote). Thus, this process is very essential and important.
The reduction is accomplished by 2 divisions after the duplication of chromosomes
- first division: separation of homologous pairs of chromosomes (this reduces the total in half)
- second division: separation of sister chromatids of a chromosome.
The rearrangement in meiosis occurs by crossing over/genetic recombination.
This is the exchange of genetic material between homologous pairs of chromosome bringing about a rearrangement and genetic variation
An example of a chromosomal abnormality that arises as a result of defects in this process is the Down Syndrome which is caused by a nondisjunction of the chromosomes 21 pair in a sex cell.
This condition produces offsprings that have some characteristic facial features, short stature etc
