1/2
For instance the two parents could be AB and AB
The possible combinations are: AA AB BA BB
2/4 of those are heterozygous, or 1/2.
<span>Since mature red blood cells do not contain a nucleus, more room is available for Hemoglobin. It is a protein that is used in transporting oxygen and is extremely important for the body. </span>
I would say its true. Does inanimate objects do life like things?
Answer:. Nondisjunction during meiosis I in either the male and female gamete
The failure of homologous chromosome to separate at mitosis, or failure of sister chromatids to separate at Anaphase of meiosis I or ii is called non-disjunction.
In this cell division anomaly the unsegregated chromosomes are separated into cells as single chromosomes, therefore extra copies are therefore inherited.This result is one of the cell having an extra copies of chromosomes than others( chromosomes 21.
If this extra chromosome copies is segregated into a sperm or egg, the resulting zygote cells will have extra copy as chromosome 21, and hence Down syndrome.
→It is more common in Meiosis 1 than ii,because of longer duration of the first stage of division than meiosis ii,given rooms to errors.
→Most common in women(with age increase) than men because of exchange of telomeres in them,which worsen with age. Their Meiotic mechanism which weaken with age, and more prone to errors compare to men,
Explanation:
<span>Stimulation of muscarinic receptors, a type of ACh receptor located in postganglionic synapses of the parasympathetic nervous system, would cause K+ channels to open, resulting in hyperpolarization of cardiac plasma membranes and a decreased heart rate.</span>
