Answer:
yes.
Explanation:
I believe that some form of life exists outside of our planet. the galaxy is gigantic and ever-expanding. there's a very low chance that with every planet out there, there's no other life form. Now, humans have depicted aliens in many ways. green with black eyes, brown like E.T.... some speak English and some speak a language we cannot understand. I'm not sure if the life forms that are out there would be as developed as we imagine, but anything is possible with an ever-expanding universe. I think the closest we'll ever get to finding an "alien" is a couple of cells that are "alive"
The subscript; the number at the bottom right of the symbol
Answer:
(a) 1/2; (b) no
Explanation:
Glucose-6-phosphate dehydrogenase deficiency (G6PD) is an X-linked recessive disorder and the woman's father was diseased so it means that woman is a carrier of the allele but has normal phenotype. It means that she will have XXᵇ genotype.
In contrast to this, her husband is diseased so his genotype will be XᵇY.
The Punnett square diagram related to the cross is attached.
(a) Proportion of their sons expected to be G6PD is 1/2:
They both may give birth to 4 progeny with genotypes XXᵇ, XᵇXᵇ, XY and XᵇY. It means they both may have 2 sons out of which one with genotype XᵇY will be diseased while the one with genotype XY will be healthy. So the proportion of their sons having G6PD is 1/2 or 50%.
(b) If the husband were G6PD deficient, the answer will not change.
The reason behind this is that this disease is caused by an allele located in X chromosome. But father contributes only Y chromosome to his son not X chromosome. The X chromosome will affect the genotype of his daughter not son that is why answer will not change. It means they will still have 1/2 of their sons diseased.