THIS IS URGENT PLZ HELPPP ( I NEED A 3 PROPER ANSWERS ) Plutonian Tickle-bellies have a sex determination system just like mammals. Hairy Snout is a

holandric trait (carried on the Y chromosome). MyxRot, a handsome male Tickle-belly, has

lovely orange hair on his snout. He and his mate, OrgggWny, have six offspring, three boys and

three girls. Please answer the following questions about this family.

a. How many of MyxRot's and OrgggWny's offspring have hairy snouts? Can you predict

which ones?

b. Their eldest son, Bob, marries and has a son. What is the chance that Bob's son will also have

a hairy snout?

c. JoKchew, MyxRot's and OrgggWny's youngest daughter, marries a male who has a

smooth, hairless purple snout. She has eight offspring, each one lovelier than the last, and all

boys. What percentage of these offspring do you expect to have hairy snouts? Explain.

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation:

answer: 45

explanationyou have to add as well to be it could be

an individual’s sex (i.e., whether they are a male or female) is determined by the sex chromosomes. most people have two sex chromosomes, one that is inherited from their mother and one that is inherited from their father. typically, females have two x chromosomes (xx) and males have one x chromosome and one y chromosome (xy). conditions caused by changes (“mutations”) in genes located on the x chromosome are considered x-linked.

x-linked recessive inheritance

most x-linked conditions are recessive. this means that in a person with two x chromosomes (most females), both copies of a gene (i.e., one on each x chromosome) must have a change or mutation whereas in a person with one x chromosome (most males), only one copy of a gene must have a mutation. a female with a mutation in one copy of a gene on the x chromosome is said to be a “carrier” for an x-linked condition. a male with a mutation in a gene on the x chromosome is typically affected with the condition. because females have two copies of the x chromosome and males have only one x chromosome, x-linked recessive diseases are more common among males than females. however, x-linked recessive diseases can occur in both males and females.

for x-linked recessive disorders, an unaffected carrier mother who has a mutation in a gene on the x chromosome can transmit either the x chromosome with this mutation or a “normal” x chromosome to her children. if the father is unaffected, none of her daughters will be affected and all of her daughters will be unaffected—since they will inherit at least one normal x chromosome from their father. however, each daughter will have a 50% chance of being an unaffected carrier like her mother and a 50% chance of both x chromosomes being normal.