Answer:
The three basic types of adaptations, based on how the genetic changes are expressed, are structural, physiological and behavioral adaptations. Most organisms have combinations of all these types.
Explanation:
Living things are adapted to the habitat they live in. This is because they have special features that help them to survive. The development of these special features is the result of evolution due to gene mutation. These mutations aid in the survival and reproduction and passes on from one generation to the other.
The answer is; the cell could not pair homologous chromosomes during meiosis.
For meiosis to occur, the sister chromosomes pairs line up in the metaphase-plate so that each chromosome of the pair is pulled to the opposite pole by the spindle in anaphase. Therefore, meiosis can only occur in cells with normal ploidy so the ploidy halved by meiosis.
Stem cells of the animals are the most similar to the meristematic cells of the plant.
<u>Explanation:</u>
- Meristematic cells are the most important cells for the plant which give rise to the various tissues and plant organs. These meristematic cells are capable to undergo cell division and they are called totipotent.
- The stem cells of animals and humans are capable of doing the function by replacing the new cells for growth and development.
- The difference among these two tissues is that meristematic is capable to produce total organs whereas stem cells are capable to produce only specific tissues.
<span>To have the disease, males need only one copy of the affected X.</span>
So, the frequency of affected males will be the frequency
of the disease allele = 0.02
Females must inherit two copies and be
homozygotes, so the frequency of affected females will be the double of frequency
of the disease allele = (0.02)
Since the ratio between female and male is 50:50
that is half of the population is male and half female
<span>Then the overall frequency of the disease will be,</span>
(0.5) (0.02) + (0.5) (0.0004) = 0.01 + 0.0002
<span>Thus, the frequency of affected
individuals in this population is <span>0.0102.</span></span>
