The allele (aa, aa, or aa) combinations are achieved through what process? question 1 options: meiosis mitosis interphase mendelian question 2 each box in a monhybrid cross is worth how much percentage? question 2 options: 25% 50% 75% 100% question 3 if you cross pp with pp what is the percentage that the offspring will have at dominate trait? question 3 options: 25% 50% 75% 100% question 4 in incomplete dominance lets say we cross a red (rr) x with a white (ww) flower. what is the percentage we will get pink (rw) question 4 options: 25% 50% 75% 100% question 5 which is not one of the possibilities that could arise through independent assortment of tthh question 5 options: th th ht tt question 6 which combination is the rarest to have? question 6 options: aabb aabb aabb aabb question 7 what is the percentage the seeds will be round and yellow? question 7 options: 6% 19% 25% 56%

Answer 1-

Mendelian

The different allelic combinations are made by the process of mendelian inheritance. This happens before cell division.

Answer 2-

25%

In a monohybrid cross, there are four boxes, and thus each box denotes 25% share.

Answer 3-

75%

The cross between Pp and Pp will look like the image shared below. Here, PP and Pp will show dominant trait. Since, it is 3 out of 4 boxes, it will be 75%.

Answer 4-

100

The punnett square for this cross RR and WW is shown below. Since all the offsprings are RW, therefore it is 100% pink flowers.

Answer 5-

Tt

Since it is a case of dihybrid cross, the gametes formed from TtHh would contain both the alleles. The possible gametes would be TH, Th, tH and th.

Answer 6-

aabb

In any dihybrid cross with dominant alleles, the probability of getting aabb would be the least.

Answer 7-

56%

In a cross AaBb and AaBb, the probability of getting both dominant traits- round and yellow, would be 56%

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.