Biology, 31.07.2019 00:00 dboby

Aman with a genetic disease marries a woman who does not carry the disease. it is not possible for their son to carry the disease. the disease must be?

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Answer from: ajayrose

The disease must be an X-linked disease (both dominant and recessive are possible), or a recessive trait.

The son will inherit one of his mom's X chromosomes and his dad's Y chromosome. If it is impossible for the son to get it, it certainly is not located on the Y chromosome, which he will get from his dad.

It could be on his dad's X chromosome, either dominant or recessive, and he would have a 0% chance of getting it, since he will not get his dad's X chromosome.

It could also just be a recessive, non sex-linked trait, in which case he could not possibly get it because his mom is not a carrier.

Answer from: Quest

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.

Answer from: Quest

answer:

the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.

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Aman with a genetic disease marries a woman who does not carry the disease. it is not possible for t...

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