In humans, red-green color blindness is determined by an x-linked recessive allele (a), whereas eye color is determined by an autosomal gene, where brown (b) is dominant over blue (b). a. what gametes can be formed with respect to these genes by a heterozygous, brown-eyed, color-blind male? b. if a blue-eyed mother with normal vision has a brown-eyed, color-blind son and a blue- eyed, color-blind daughter, what are the genotypes of both parents and children? if the dominant allele a is negeceary fos oarino.

1. XaY,BB and XaY,Bb

2. Father: XaY,Bb

Mother: XAXa,bb

Son: XaY,Bb

Daughter: XaXa,bb

Explanation:

1. Gender: Male --> XY, Color-blind male: XaY, Brown-eyed: BB or Bb. Combine the aforementioned, the gametes can be formed with respect to these genes by a heterozygous, brown-eyed, color-blind male are: XaY,BB and XaY,Bb

2.  MOTHER: Blue-eyed female with normal vision : XAXA,bb or XAXa,bb

SON: brown-eyed male, color-blind:  XaY,BB or XaY,Bb

DAUGHTER: blue- eyed female, color-blind: XaXa,bb

From the genotype of the son, we can assume that the father must has brown eyes: BB or Bb. Besides, the daughter has blue eyes. Thus, the daughter received the autosomal gene "b" from her parents. At the conclusion, the father eyes color genes is Bb. We can assume that Father genre can be XAY,Bb or XaY,Bb.

Both of son and daughter are color-blind. Thus, Mother genotypes should have Xa. Finally, Mother Genotypes is: XAXa,bb.

Because both children are color-blind, the father genre is: XaY,Bb, brown eyes and color-blind male

Mother (XAXa,bb) × Father (XaY,Bb)

the answer will be a) proteins i believe

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!