BIO 214 Exam 3 Questions and
Answers 100% PASS
explain why dominant and recessive alleles evolve at different rates in response to
natural selection - CORRECT ANSWER-evolution @ single dominant gene
occurs @ predictable rate
- under selection: dominant alleles will evovle quickly when rare and slowly when
common; recessive alleles evolve slowly when rare and quickly when common
kinetochore microtubules move chromosomes when - CORRECT ANSWER-
during mitosis
when allele first shows in population, a beneficial allele - CORRECT ANSWER-
natural selection will cause an increase of frequency
- recessive beneficial allele determine more by genetic drift than natural selection
evolution - CORRECT ANSWER-change in gene frequency in pop over time
,how heterozygote advantage will affect evolution - CORRECT ANSWER-
heterozygotes have greater reproductive success than homozygotes leading to
maintenance of 2 alleles in population
heterozygotes have both alleles which is needed for genetic variation
kinetochore microtubules in anaphase I do what? - CORRECT ANSWER-
facilitate seperation
how do heterozygote advance relates to sickle cell - CORRECT ANSWER--
strong heterozygote adv: pple w/ 1 copy of the allele are resistant to the maleria
- causes disease by burrowing into red blood cells
- ppl w/ sickle cell trait, the red blood cells are resistant to malaria infection
3 components of microevolution - CORRECT ANSWER-mutation genetic drift
and natural selection
independently assorting - CORRECT ANSWER-- alleles of 2 or more different
genes get sorted into gametes independently of one another
- allele a gamete recieves for 1 gene does not influencethe allele recieved for
another gene
© 2026 Copyright. All Rights Reserved. This document is
protected by copyright law
, kinetochore microtubules in anaphase II do what? - CORRECT ANSWER-help
move sister chromatids
law of independent assortment - CORRECT ANSWER-9:3:3:1 ratio
mutation - CORRECT ANSWER-change that occur in DNA due to a mistake
when DNA is copied
if not independtly assorting then---> - CORRECT ANSWER-complete linkage---
> color/shape genes are physically stuck together and cannot be seperated--->
results in a combo unit ---> 3:1 ratio
Microtubules do this how? - CORRECT ANSWER-microtubule motor protein
pull on the microtubules and they begin to break
linkage map - CORRECT ANSWER-A genetic map based on the frequencies of
recombination between markers during crossing over of homologous
chromosomes.
genetic drift - CORRECT ANSWER-random change in allele frequencies that
occurs in small populations
Nondisjunction - CORRECT ANSWER-faitlure to separate,
gain or loss of whole chromosomes
Recombination - CORRECT ANSWER-the genetic process by which one
chromosome breaks off and attaches to another chromosome during reproductive
cell division
Answers 100% PASS
explain why dominant and recessive alleles evolve at different rates in response to
natural selection - CORRECT ANSWER-evolution @ single dominant gene
occurs @ predictable rate
- under selection: dominant alleles will evovle quickly when rare and slowly when
common; recessive alleles evolve slowly when rare and quickly when common
kinetochore microtubules move chromosomes when - CORRECT ANSWER-
during mitosis
when allele first shows in population, a beneficial allele - CORRECT ANSWER-
natural selection will cause an increase of frequency
- recessive beneficial allele determine more by genetic drift than natural selection
evolution - CORRECT ANSWER-change in gene frequency in pop over time
,how heterozygote advantage will affect evolution - CORRECT ANSWER-
heterozygotes have greater reproductive success than homozygotes leading to
maintenance of 2 alleles in population
heterozygotes have both alleles which is needed for genetic variation
kinetochore microtubules in anaphase I do what? - CORRECT ANSWER-
facilitate seperation
how do heterozygote advance relates to sickle cell - CORRECT ANSWER--
strong heterozygote adv: pple w/ 1 copy of the allele are resistant to the maleria
- causes disease by burrowing into red blood cells
- ppl w/ sickle cell trait, the red blood cells are resistant to malaria infection
3 components of microevolution - CORRECT ANSWER-mutation genetic drift
and natural selection
independently assorting - CORRECT ANSWER-- alleles of 2 or more different
genes get sorted into gametes independently of one another
- allele a gamete recieves for 1 gene does not influencethe allele recieved for
another gene
© 2026 Copyright. All Rights Reserved. This document is
protected by copyright law
, kinetochore microtubules in anaphase II do what? - CORRECT ANSWER-help
move sister chromatids
law of independent assortment - CORRECT ANSWER-9:3:3:1 ratio
mutation - CORRECT ANSWER-change that occur in DNA due to a mistake
when DNA is copied
if not independtly assorting then---> - CORRECT ANSWER-complete linkage---
> color/shape genes are physically stuck together and cannot be seperated--->
results in a combo unit ---> 3:1 ratio
Microtubules do this how? - CORRECT ANSWER-microtubule motor protein
pull on the microtubules and they begin to break
linkage map - CORRECT ANSWER-A genetic map based on the frequencies of
recombination between markers during crossing over of homologous
chromosomes.
genetic drift - CORRECT ANSWER-random change in allele frequencies that
occurs in small populations
Nondisjunction - CORRECT ANSWER-faitlure to separate,
gain or loss of whole chromosomes
Recombination - CORRECT ANSWER-the genetic process by which one
chromosome breaks off and attaches to another chromosome during reproductive
cell division
