Concept Questions:
pg 266:
6) a)
b) A haploid set is made up of only ​one set of genetic
information​. There are ​no​ homologous pairs present,
meaning there are ​only​ sister chromatids present. Sister
chromatids are just copies of DNA that result from DNA
synthesis.
A diploid set is made up of ​homologous pairs
(chromosomes that have the same length, loci, and
characteristics) that contain multiple sets of genetic
information.
c) Metaphase is currently being shown.
7) The cell is undergoing meiosis because there is a
tetrad/2 homologous chromosomes lined up at the
metaphase plate, not sister chromatids.
8) A switch from asexual to sexual reproduction under unfavorable conditions may occur because a species will increase its chances of survival if
it utilizes genetic variation to increase the probability of developing a useful mutation that may allow it to grow and reproduce than if it were to do
nothing.
10) Chromosomal behavior during sexual reproduction in animals continues the passing on of parental traits and genetic variation by replicating
the parental DNA (DNA synthesis) forming sister chromatids are eventually separated during anaphase. Genetic variation is introduced when
nonsister chromatids of homologous pairs crossover during synapsis, resulting in a small but effective exchange of genetic information.
pg 274:
14.1: 2) 64.
3) Self-pollination is considered sexual
reproduction because gametes (involved in
meiosis and thereby introduce genetic
variation) fuse together during fertilization.
pg 290-291:
5)
6)
7) Tetrahybrid cross broken down into
four monohybrid crosses!
8)