These are the correct answers to the following questions:
<span>1. Barney and Betty are about to have their first child. They both have "normal" feet but Barney's father has flat feet and Betty has a child from a previous marriage who has flat feet, meaning they are both heterozygous for the trait. What is the probability that they will have a boy with flat feet(recessive trait)?
A.25%
B.50%
C.100%
D.75%
2. humans, the ability to roll the tongue is a dominant trait. The inability to roll the tongue is a recessive trait. If two individuals homozygous recessive for this trait have a child, what is the chance that the child will be able to roll his tongue?
A.100%
B.0%
C.50%
D.25%</span>
Answer:
True
Explanation:
When the resting potential of the membrane is changed, the membrane becomes either more negative inside or less negative. This small deviation from the resting potential is called graded potential. A graded potential occurs when a stimulus triggers opening or closing of the mechanically gated or ligand-gated channels present in the plasma membrane.
For example, the presynaptic neuron releases neurotransmitters in response to a nerve impulse. The neurotransmitter binds to receptors present in the plasma membrane of the postsynaptic neuron and triggers the opening of the ion channels to allow the inflow of particular ions to flow. The flow of ions changes the voltage across the membrane. This change in membrane voltage is a postsynaptic potential and is a type of graded potential.
Heritability is a measure that is used to estimate the variation of phenotypic traits (observable traits) in a given population due to the variation or changes in the genetic make up (genotype) among certain individuals. some of these traits includes color blindness, tongue rolling and curly hair among others. However, some traits such as nearsightedness are caused or influenced by the changes in the environment and therefore Heritability is not a factor to consider when dealing with such traits.
<h2>Lymphatic System</h2>
Explanation:
- The <u>Blood pressure</u> in the capillaries drives the filtration of water and small molecules from the blood into the <u>interstitial space </u>of the tissues.
- The invulnerable system is the mind boggling assortment of cells and organs that annihilates or kills pathogens that would somehow cause malady or passing.
- The lymphatic system, for a great many people, is related with the safe system to such an extent, that the <em>two system are for all intents and purposes undefined. </em>
- The lymphatic system is the arrangement of <em>vessels, cells, and organs</em> that conveys abundance liquids to the <em>circulatory system and channels pathogens from the blood.</em>
- The growing of lymph hubs during a contamination and the vehicle of lymphocytes by means of the<em> lymphatic vessels are nevertheless</em> two instances of the numerous associations between these basic organ system.
- Circulatory strain <em>causes spillage of liquid from the vessels, bringing</em> about the aggregation of liquid in the interstitial space that is, spaces between singular cells in the tissues.
- In people, 20 liters of plasma is discharged into the interstitial space of the tissues every day because of slender filtration.
- Lymph is the term used to portray interstitial liquid once it has entered <em>the lymphatic system.</em>
Answer:
Humans contain 46 chromosome or 23 pairs of chromosomes. Among them 22 pairs are autosomes and one pair contains the sex chromosome. Humans female are XX and human males are XY.
The X chromosome determines the sex of an individual and females one X chromosome is randomly inactivated. The human X chromosome has large number of genes and contains large euchromatic regions that are highly activating gene regions. The X chromosome also contains the conserved regions that are far shorter in Y chromosome. The X chromosome is large in size and has large number of genes.