Some people have freckles, and some people do not have freckles. If a child has freckles, at least one parent has freckles.
Freckles are determined by two genes instead of by one. If Mendel had crossed a true breeding dominant plant with a true breeding recessive plant, in which of the three generations is the recessive trait visible.
Freckles are not determined by DNA. There are two alleles for freckles. There is no dominant allele for freckles. Freckles are determined by two genes instead of by one. F1 generation .P generation, F1 generation and F2 generation, P generation and F2 generation.
Primase is an enzyme that synthesizes short RNA sequences called primers. These primers serve as a starting point for DNA synthesis during replication as the DNA polymerases cannot begin the synthesis of the new strand, they only extend it after primase begins it and primase produces RNA molecules, the enzyme can be said to be a type of RNA polymerase.
Therefore, Some people have freckles, and some people do not have freckles. If a child has freckles, at least one parent has freckles.
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Part 1.
The correct answer is option 2.There are two alleles for freckles.
According to the condition of the occurrence of the freckles, it can be concluded that the freckle is an autosomal dominant condition. The freckle can only be inherited, if there is at least one dominant allele in any of the parent. If both the individuals are heterozygous for the trait, they can produce an offspring without freckle by passing down the recessive alleles to the progeny. So, the freckles are controlled by two alleles, which can be either dominant or recessive.
Part 2.
The correct answer is option 4. P generation and F2 generation.
In this case, it is given that true bred homozygous recessive plant is crossed with true bred homozygous dominant plant. The true bred recessive plant always shows the recessive phenotype. When true bred homozygous recessive plant is crossed with true bred homozygous dominant plant, the F1 generation would produce all the heterozygous individual and exhibit dominant phenotype. When the F1 generation is self crossed, it result in 75% dominant phenotype and 25% recessive phenotype.
A possible cross for this case is given in the picture.
B. differs from the normal protein by one amino acid
C. can carry less oxygen and more carbon dioxide
D. is normal
The hemoglobin of sickle cell anemia differs from the normal protein by one amino acid i.e., glutamic acid is replaced by valine.
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The hemoglobin of a sickle cell anemia: C.
A sickle cell is when it runs out of oxygen and only carries CO2 which can cause many health problems in the body.
Part I
In extension to measuring the amount of light that enters the eye, the pupillary light reflex presents a helpful diagnostic tool. It provides for examining the uprightness of the sensory and motor functions of the eye. if your pupils didn't shut suddenly when abruptly disclosed to light, you'll get a tremendous shot of light (simultaneously with UV rays and other possibly dangerous rays) to your retina, which can severely mess up your vision.
Part II
Without it, we would go blind. If there is not sufficient light and the pupils do not dilate, a small number of light will pass to the retina and the image will be damaged.
Answer:
Fat has more than twice as many calories per gram as carbohydrates and proteins.
Explanation:
Answer:
Plasma plays an essential role of transporting nutrients and waste.
Explanation:
The largest constituent of the blood that comprises 55 percent of its entire constituents is the plasma. It is a light yellow liquid, which along with water transports enzymes and salts to different parts of the body. Plasma primarily plays an essential role in transporting hormones, nutrients, and proteins to different body parts.
Apart from this, plasma also carries waste materials withdrawn from the cells and discharges it out of the body.
b. hearing
c. precognition
d. telepathy
Answer:
Option b=> hearing.
Explanation:
When information are getting to individual without the person using his or sense organs such as the eyes(vision), ears(audio/hearing), skin(feeling), tongue (tasting) and nose(perceiving smell) then we say that the individual has '' psychic powers'' or the sixth sense.
extrasensory power.
If you look at the meaning of option (a), that is clairvoyance, it is more of seeing the future which can never be seen with our normal eyes, therefore, it is an extrasensory power
Option (b), can be done with our normal ears, hence, it is not an extrasensory power.
Option (c) and (d) that is precognition(knowing what is coming without seeing with norm human eyes) and telepathy(being able to read People's mind) respectively are both extrasensory powers.