Response asap
refer to the figure showing a pedigree of a family affected by a sex-linked recessive disorder. if a female is a carrier for a sex-linked recessive disorder, is it possible for her sons to be unaffected by the disorder? choose the best answer and explanation.
a. yes, this is possible. males receive an x chromosome from their mother. if their mother is a carrier, a male has a 50 percent chance of being affected by the disease and a 50 percent chance of being unaffected.
b. no, this isn't possible. if a mother is a carrier of an x-linked recessive disorder, her sons will be affected by the disease and her daughters will be carriers of the disease.
c. no, this isn't possible. x-linked recessive disorders can't "skip" generations like other genetic disorders.
d. yes, this is possible. males receive an x chromosome from their mother. if their mother is a carrier, the mutated x chromosome won't be passed on to sons and so they'll be unaffected.

The correct answer is option A.

Explanation:

If a particular woman is a carrier (XhXH) for a sex-linked disease that means she has one copy of the recessive gene on X-chromosome(Xh) and one copy of the dominant gene on X- chromosome (XH).

For a male offspring of a carrier mother to not get affected by a sex-linked disorder there are 50 percent chances if his father is not affected. In this case, Male offspring receive an X chromosome only from mother. So it could be Xh or XH so this offspring has a 50% chance of being affected or unaffected.

Thus, the correct answer is option A.

increase soil erosion                                             reduce soil erosion

cattle grazing                                                         hydroseeding

deforestation                                                         contour plowing

                                                                                planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion

a. seed plant structure. 1. the three main plant organs are roots, stems, and leaves. a fourth kind of tissue, meristematic tissue, is responsible for plant growth. meristematic tissue is the only plant tissue that produces new cells by mitosis. plants can lose water out of their leaves as they exchange gases with the air

explanation: