One of there ansestors must have had blue eyes, or might have been a genetic mutation. But it's rare to find such a random mutation. But we must keep in mind that reproduction of cells and when DNA is copied it could have a mutation. But the likely explanation would be that one of there ansestors or grand parents had blue eyes until the trait that forms brown eyes became more common in the family tree.
Answer:
A) The eye colour may be controlled by one or more genes, mutation lies in two different genes and has complemented each other.
B) Parent 1: w1w1 w2+w2+ Parent 2:w1+ w1+w2w2
Gametes: w1 w2+ and w1+w2
Offspring genotype: w1 w2+ w1+ w2
Explanation:
This condition may be because of complementary genes. When the presence of two or more genes are required for a particular trait and the absent of one of the genes affects the character, it is referred to as complementary genes. In this condition the wild type of fly have AA/BB type of gene and expression of both gene is responsible for red coloured eyes.
a. Mutation in any of the genes, affect the accumulation of red pigment in eyes and cause the eyes to be white colored. Given that two mutants W1 and W2 have white eyes but both have mutation in different genes. Suppose W1 has mutation in AA gene(genotype aaBB )and mutant W2 has mutation in BB gene (genotype AAbb).
b. Crossing between mutants give red colour eyes fly:
Parents AAbb x aaBB
Gametes Ab aB
Progeny AaBb
That is,
Parent 1: w1w1 w2+w2+ Parent 2:w1+ w1+w2w2
Gametes: w1 w2+ and w1+w2
Offspring genotype: w1 w2+ w1+ w2
Result: progeny of mutant have both type of functional alleles (A and B), responsible for red colour of eyes. Thus the progeny will be with red colour eyes.
Answer: glycolysis in the cytoplasm
step-by-step-explanation: Pyruvate is produced by glycolysis in the cytoplasm, but pyruvate oxidation takes place in the mitochondrial matrix (in eukaryotes). So, before the chemical reactions can begin, pyruvate must enter the mitochondrion, crossing its inner membrane and arriving at the matrix
B is the answer because they are curious about how the bees find flowers. they want to know the answer, therefore curiosity would be my answer.
