The zebra finch (Taeniopygia guttata) is a songbird used as a model organism to study behavior, neurobiology, toxicology, endocrinology, and genetics. Zebra finches are diploid with a total of 80 chromosomes (2n=80). (1pt)a. How many chromosomes are present in a cell during G1 of interphase?b. How many sister chromatids are present in a cell during metaphase in mitosis?c. How many chromosomes are present in a cell during anaphase in mitosis?d. How many sister chromatids are present in a cell during metaphase II of meiosis?

A) 80

B) 160

C) 160

D) 80

Explanation:

Given-

Total number of  chromosomes in Zebra finches

A) During the G1 phase, a cell synthesizes mRNA. Thus the number of chromosome and chromatid remains the same.

Hence, chromosomes are present in the G1 phase of the cell division.

B) During meta phase,  the number of sister chromatids is equal to twice the number of chromosomes.

Hence, there will be   chromatids in the metaphase in mitosis

C) Number of chromosome is equal to twice the number of chromosome i.e.

D) During metaphase II of meiosis, the number of  sister chromatids  is equal to the total number of chromosome i.e

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.