In simple words, osteoporosis can be stated as the medical state in which the bones become breakable and weak from loss of tissue. Due to the deficiency of calcium or vitamin D.
<u>Explanation:</u>
<u>Environmental factors that influence osteoporosis:</u>
- Due to smoking, and consuming alcohol leads to the Osteoporosis.
- Intake of Poor diet food and intake of low calcium can leads to Osteoporosis .
- Chronic diseases like arthritis and liver infection can cause Osteoporosis .
- Due to the Malabsorption, it will lead to Osteoporosis .
- Vitamin D helps the body to absorb calcium.
- When vitamin D is wanting, the body cannot absorb sufficient amounts of calcium to inhibit osteoporosis. Some medications can cause osteoporosis.
Answer:
Option-D
Explanation:
In the given question the genotype of parental allele is- AbaB X AbaB. The alleles formed will be- AB, Ab,aB, ab in which the crossover allele will be AB and ab.
1. Unlinked genes
Now of these alleles are unlinked then the alleles will assort independently of each other therefore performing the punnett square we will get dihybrid ratio as 9:3:3:1 in which
1. A_B_ are 9
2. aaB_ are 3
3. A_bb are-3
4. aabb- 1
Since the crossover allele are AB and ab therefore A_B_ are 9 and aabb- 1 represent recombinant genotype.
2. Linked genes
When the genes will be linked then chances of crossing over will be reduced as a result of which only two type of allele will be formed which are- Ab and aB and the recombinant frequency will become less.
Crossing these allele will form Aabb
, AaBb
, AaBb and aaBB genotypes.
The recombinant ratio will decrease as A_B_ is 2 and aabb is not present.
Thus, option-4 which states that the unlinked ration is 9:3:3:1 and linked ratio is <9: >3: >3: <1 is correct.
Answer:
H. Vacuole.
Explanation:
Vacuole is the organelle that is responsible for storing of water and helps to maintain the shape of plant cell. Plant cell has one large vacuole that maintain water balance in plant cell. vacuoles are also used to store cellular fuel by some cells in animals, plants, and microorganisms. In animals, vacuole is small and responsible for the storing of waste products that are produced in the cell.
This organism belongs to the Plantae kingdom
