bio 100 exam 3 umaine with correct answers 100% 2025

bio 100 exam 3 umaine with correct answers 100% 2025 Which of the following occurs during interphase - Correct Answer all chromosomes are duplicated The goal of binary fission and mitosis is to... - Correct Answer produce genetically identical cells What is the difference between mitosis in plants and animal cells - Correct Answer both c and d are correct - plant cells create a cell plate that separates the two newly formed nuclei - animal cells have cleavage furrows between the newly forming cells Which of the following is observed during cell division (mitosis) in some unicellular eukaryotes (dinoflagellates and yeasts) but not in multicellular eukaryotes such as trees and dogs - Correct Answer the nuclear membrane does not disintegrate during cell division Which of the following describes the difference between mitosis and meiosis - Correct Answer mitosis involves one division cycle and results in diploid daughter cells, while meiosis consists of two division cycles and results in haploid gametes The image below might represent ___ in mitosis or ___in meiosis (daughter chromosomes beginning to separate from middle) - Correct Answer anaphase/ anaphase II Which of the following increases the likelihood of generating new combinations of alleles in the offspring of two individuals - Correct Answer all of the below lead to new allele combinations - random combinations of different gametes - crossing over between non sister chromatids in the individual parents - independent assortment of chromosomes during gamete formation What event has occurred between image A and B - Correct Answer crossing over The two individual X- shaped structures shown in the figure at right together are best described as - Correct Answer homologous chromosomes If you saw cells as depicted in the image below what might be happening (chromosomes in the middle) - Correct Answer all the below might occur - synapsis has happened - tetrads have formed - chromosomes have independently sorted - crossing over of genetic information TH Morgan concluded that... - Correct Answer the gene for eye color must be located on a sex chromosome If a hybrid F2 female is crossed with a white eyed male, what are the expected F3 phenotypes - Correct Answer half of the males and females will have white eyes. The others will have red eyes The Drosophila genes for body color and wing length have been mapped on chromosome 2 as shown below. In a cross between a fruit fly homozygous for both wild type phenotyeps (grey body and normal wings) and one for both mutant phenotypes (black body and vestigial wings) all the F1 have grey bodies and normal wings. One F1 individual is back crossed to the double mutant resulting in 1006 offspring. How many F2 individuals would you expect to have a black body and normal wings - Correct Answer 93 Calico cats display black and orange fur patches, are genetic mosaics and are exclusively female because... - Correct Answer X chromosomes are randomly inactivated in the female cat resulting in their being genetic mosaics with respect to coat color alleles During the formation of gametes, if nondisjunction of one chromosome pair occurred during meiosis I, then... - Correct Answer the tetrads did not separate and all these particular chromosomes ended up in one daughter cell