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How does eye colour change, particularly in childhood? (example: my eyes used to be blue, but are now greenish-hazel).
In some cases two species can hybridize. For example, Tigers and lions can hybridize to produce "Ligers".
I have seen many articles that talk about a star's "habitable zone" as the ring around it which is just the right temperature for planets to have liquid water, which is necessary for life.
I am planning to utilize a new system in our lab, in which I will co-culture cancer cells from different tissues with fibroblasts. I have the option to receive skin-derived primary fibroblasts. I ha
I have heard here and there that instead of consuming 3 largish meals (the traditional 3 meals a day), that consuming several smaller meals throughout the day is beneficial for health (and weight lo
In aliens, a glossy exoskeleton (G) is dominant to a dull exoskeleton (g).Also, excessive drooling (D) is dominant to no drooling (d). An alien drone (male) with a glossy exoskeleton and excessive d
Based on their family histories, a couple knows that they are each heterozygous for alkaptonuria (remember that condition where black urine is produced).The alkaptonuria phenotype is autosomal reces
In guinea pigs, white coat (w) is recessive to black coat (W) and wavy hair (v) is recessive to straight hair (V).A guinea pig that is black with straight hair but has an unknown genotype is crossed
You are given a sequence of 6000 mRNA bases (mature mRNA without introns) and told that this sequence encodes an ion channel.
In a population of desert bighorn sheep, a mutant recessive allele c has been found to cause curled coats in both males and females. The normal dominant allele Cproduces straight coats. The frequenc
If the initial allele frequencies are p = 0.75 and q =0.25 and the a allele is a lethal recessive, what will be the frequency of the a allele in the future?
Calculate the equilibrium potential for K+ (Ek) if its extracellular concentration rises from 5mM to 10mM. Comparing this to the normal Ek, is the change a depolarization or hyperpolarization?
Suppose a semipermeable membrane separates two solutions. One solution has 0.72g glucose to 1.0L of water; the other has 0.117g NaCl to 1.0 L of water.
Emisolid media for motility determination uses a lower percentage of agar compared to solid media.
A woman heterozygous for the X-linked allele that causes for Duchenne muscular dystrophy has children with a man with a normal allele.
Hemophilia is an X-linked recessive trait in humans. If a heterozygous woman has children with an unaffected man,
Which blood phenotypes (A, B, AB, and O) can be attributed to a single genotype?
A group of Ethiopians were assayed for CCR5-del32 deletion polymorphism. 247 were +/+, 69 were +/del32, and 11 were del32/del32.
A zoologist is investigating a population of squirrels whose coat color is controlled by a single gene whose two alleles (B1 & B2) are codominant. B1B1 individuals are black, B1B2 individuals ar
Assuming no interference between the regions, if the parental plant is crossed with the a b c/a b c plant, how many progeny will have the phenotype of A B c if there are 1000 total progeny
I am puzzled about whether the TF only binds to DNA in the initiation stage of transcription and will detach during transcription. (I am thinking if the TF bind to the sense strand, it will block th
I was under the impression that if a cell doesn't have active transport, it either would lose molecules through the membrane and not be able to maintain a proper gradient, or molecules would be trap
This patient's presynaptic neuron (nerve) action potentials and conduction velocities are normal. New information: With repeated stimulation of the efferent nerve to the arm and hand, the neuron ac
What decides whether an activated B cell will get converted to plasma cell
As far as we know Ape Men or the Neanderthal Man was the first to bury its dead.