Answer:
When we talk about the inheritance of traits, or the passage of traits from parents to future generations down the line, we are not just talking about the visual (phenotypical) expression of those traits, but also, their underlying explanation, which is the genotype. A genotype is basically how the genes of the parents combine in such a way that the children inherit a set of traits from the parents, and express them phenotypically, or not.
In the case of blood types, we have four phenotypic groups: A, B and O. Each one of these types is characterized by the underlying set of genes that are responsible for what is expressed. While the O blood type presents a genotype ii, which is recessive, the A and B types will have the following genetic patterns: Ia Ia, or, Ia i (characteristic of the O genetic material) for the A type and: Ib Ib, or Ib i, for the B type. When there is a genetic conjugation from parents genetic material, regarding blood type, we would have these sets of genes combining. In most of the possible combinations genetically speaking, we have the recessive i gene appearing, including in the A and B dominant blood types. This means that when crossed, there will always be a chance of at least one offspring presenting the O blood type, even if one of the parents is dominant A, or B.
In answer: it is the fact that all three types present the recessive allele i, typical of the O blood type, that when pairings of genes happen between parents, the genetic characteristic of the O type may present itself in a dominant fashion, instead of the usual recessive pattern.
<span>Ethylene is used to ripen crops so that all plants in a crop will ripen at the same time.
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Answer: Glucose is the basic sugar produced during photosynthesis in stroma part of chloropast.
Explanation:
It occurs in a series of steps, which together constitute Calvin cycle. Glucose, the basic sugar is thus produced in stroma part of chloroplast as explained above.
Answer:
The glyptodon is found to be similar to the armadillo.
Explanation:
A piece of evidence that supports the theory of evolution is that the glyptodon is found to be similar to the armadillo. Glyptodons and armadillos have many things in common, expect that glyptodons are much larger (the size of a Volkswagen beetle!) than an armadillo. The change from the prehistoric glyptodon to our modern day armadillo helps support that there is evolution because they still have many things in common. They are genetically related.
Answer:
BB - Dark brown color - (1/4)
Bb - light tan (due to incomplete dominance) - (2/4 or 1/2)
bb - white color - (1/4)
Explanation:
Let the allele for dark brown pigment be represented by "B"
And the let allele for white (no pigment) be represented by "b"
Due to incomplete dominance, the phenotype of heterozygous species would be "light tan"
Genotype of heterozygous female - Bb
Genotype of heterozygous male - Bb
Bb * Bb
BB, Bb, Bb, bb
BB - Dark brown color - (1/4)
Bb - light tan (due to incomplete dominance) - (2/4 or 1/2)
bb - white color - (1/4)
