Since the colorblindness is located on the X chromosome, the man must have inherited his colorblindness from his mother.
<h3>X-linked traits</h3>
Women are XX while men are XY.
Also, the X chromosome in XY always comes from the mother.
Since the man is affected for colorblindness but his brother is not, it means that only one X chromosome of the mother is affected while the father can be affected or otherwise.
Assuming the father is free from colorblindness and the allele is represented by c:
x
Thus, the man's genotype is and it comes from the mother.
More on X-linked traits can be found here: brainly.com/question/9830755
Answer:
6 thymine, 4 guanine. 4 cytosine
Explanation:
Adenine pairs with thymine, so you need 6 of each
Cytosine matches with guanine, but the total of nucleotides is 20, so
6(adenine)+6(thymine)=12
20-12=8
8= 4(guanine)+4(cytosine)
Gnathostomes are jawed vertebrates, so they have jaws.
As a genetic counselor, you note that every generation shows the trait, suggesting that the trait is dominant.
<h3>What is a domain trait?</h3>
A dominant trait is a genetic feature that exhibits the phenotype in a dominant manner for heterozygous individuals.
Dominant traits are well known to mask the recessive alleles in the population for a given phenotypic feature.
In conclusion, as a genetic counselor, you note that every generation shows the trait, suggesting that the trait is dominant.
Learn more about dominance here:
brainly.com/question/516014
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