Answer:
1 monosomy
2 trisomy
3 Down syndrome
4 Turner syndrome
5 non-disjunction
6 metaphase
7 twenty-two
8 largest (chromosome 1)
9 smallest (chromosome 22)
10 karyotype
Explanation:
Non-disjunction during meiosis I or II occur when homologous chromosomes or sister chromatids refuse to separate. This makes the resulting gametes to have too many or too few chromosome numbers in their genomes.
A gamete with too few chromosome number that participates in fertilization with a normal gamete will result in a zygote with abnormally less chromosome number. This situation is referred to as monosomy. Whereas, the fusion of a gamete with too many chromosome number with a normal gamete will result in a zygote with too many chromosome, a situation known as trisomy.
The manifestation of monosomy and trisomy in humans results in Turner and Down syndromes respectively.
Humans have 23 pairs of chromosomes out of which a pair determines maleness or femaleness - the sex chromosome. Other chromosomes are referred to as autosomes. Hence, there are 22 autosome pairs and 1 pair of sex chromosome.
Chromosomes are studied by karyotyping, a process that involves photographing chromosomes at the metaphase stage of the cell cycle, cutting them out, and then arranging them in decreasing order of size.
Answer:
Be used as source of reserve cells for the entire blood production system.
Explanation:
Stem cells can be described as special human cells that are capable of developing into many different cell types ranging from brain cells to muscle cells. They act like renewable source of replacement cells for treating diseases.
In this case, the proliferative potential and self-renewal of stem cells makes them a compensatory mechanism and reserve source for the entire hematopoietic system. While they could be of possible use in certain autoimmune conditions or in cases of organ failure, these statements do not capture their essence.
It should be noted that, hematopoietic system is the system comprising the organs that are involved in the production of components of blood. And this is the major reason why the couple should engage in the act after consulting the caregiver.
Answer:
cell is the smallest unit of life, also called the 'building blocks of life' because cells multiply and differentiate to form a multicellular organism as well as give rise to new organism by forming gametes or reproductive spores.
No rotted plants are in the limntic zone because the water is to deep for sunlight to reach them.
Answer:
The correct answer is Aldosterone
Explanation:
Aldosterone is a steroid hormone that is secreted from the adrenal cortex.Aldosterone helps in the excretion of potassium ions from our body.
That means if potassium sparing diuretics increase urination witout loss of potassium ion from our body then these diuretics will have to work against receptor foe aldosterone.
