Color blindness is a recessive x-linked trait in humans. In a family where the mother is color-blind, and the father is normal, the probability of their having a color-blind son is 100%.
Color blindness is a recessive x chromosome liked recessive disease which is more prone in males than in females. As the mother is color-blind she has both the alleles of colorblindness while the father is normal with both x chromosome and y chromosome normal.
So if the parents have a boy, he will always receive an x chromosome with colorblindness gene from the mother and a normal y chromosome from the father always. Thus, the probability of having a colorblind boy will be 100%.
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The connection between the political situations in Iran and Nicaragua during the mid-1980s was both countries fought the USSR with weapons supplied by the United States. The correct answer is D.
Answer:
The biological level of organization represented by all of the three steps of gene expression products is <em>the central dogma of molecular biology.</em>
Explanation:
DNA is divided up into functional units called genes. Each of them provides instructions for a functional product, that is, a molecule nedeed to perform a job in the cell. In many cases, the functional product of a gene is a protein.
The functional products of most known genes are polypeptides. Genes that specify polypeptides are called protein-coding genes.
Not all genes specify polypeptides. Instead, some provide instructions to build functional RNA molecules, such as transfer RNAs and ribosomal RNAs that play roles in translation.
The construction of polypeptide involves two major steps: transcription and translation. During the transcription, the DNA sequence of gene is copied to make an RNA molecule and in translation the sequence of mRNA is decoded to specify the amino acid sequence of the polypeptide.
Day and night sunrise and sunset is based on the rotation of earth on its axis
Answer:
- Populations must be very large -True
- The frequency of all genotypes must be equal. False
- Gene flow from other populations must be zero. True
- Matings must be random. True
- There should be no natural selection. True
Explanation:
The criteria for maintaining a Hardy-Weinberg equilibrium are:
- <u>Random matings</u>: mating probabilities between individuals with determined genotypes depends on the products of frequencies of those genotypes.
- No superposed generations: each individual can leave their gametes in the pool only once.
- No mutations: There is no incorporation into the genetic pool of new gametes originated by mutation of preexistent alleles.
- <u>No migration</u>: There is no incorporation of gametes originated in another population.
- <u>Infinite population size</u>: the probabilities of randomly taking an A gamete from the pool are p and the probabilities of taking a B gamete from the pool are q.
- <u>No natural selection</u>: Each individual has the same surviving and reproducing probabilities as any other, contributing proportionally to the gamete pool.
