Chromosomes are structures that hold DNA, and are usually represented by all ’s in girls, while boys also include a chromosome, in shape. * 4 points
a.2N; X
b. Y; X
c. X; 2N
d. X; Y
e. Y; 2N

Which tool could you see a plant cell? a. a filter b. a microscope c. a microwave d. an electromagnet

Pls me i need this ! each cell has genes activated depending on it's job and what kind of cell it is. it is the presence of that causes the repressor protein to fall off and unblock the gene on the lac operon. if a gene is turned on then it is being an additional circular chromosome found in some bacteria that is used in genetic engineering.

Urgent in guinea pigs, black fur (b) is dominant over white fur (b). cross a heterozygous (hybrid) black guinea pig with a homozygous (purebred) white guinea pig. complete a punnett square, identify the genotype(s), phenotype(s), and probability (% and fraction) that the offspring will be black and white?