WHAT IS LIFE? A GUIDE TO BIO 3E+LAUNCHPA
3rd Edition
ISBN: 9781319103316
Author: PHELAN
Publisher: Macmillan Higher Education
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Chapter 7, Problem 2MC
Summary Introduction
Introduction:
A gene is consisted of two alleles for a trait, each present on one set of chromosomes in humans, who are diploid organisms. These alleles may be dominant in both chromosomes, recessive in both chromosomes, or heterologous in in two chromosomes.
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Recessive genetic disorders are more frequent than disorders inherited as dominant because :
a) recessive genetic disorders are limited to persons of the same ethnicity
c) dominant genetic disorders are never expressed in males
d) people carrying dominant genetic disorders always die before birth
e ) carriers are not eliminated by the disease before reproduction
A classical example of multiple alleles is
A)ABO blood types in humans.B)height in garden peas.C)environmental factors on the ability of genes to express themselves.D)pink flowers in heterozygous snapdragons.E)albinism in humans and animals.
When a pair of alleles that an individual carry are the same, the person is said to be_____ for the trait
a ) Polygenic
b) Homologous
c ) Autosomous
e ) Homozygous
Chapter 7 Solutions
WHAT IS LIFE? A GUIDE TO BIO 3E+LAUNCHPA
Ch. 7 - Prob. 1SACh. 7 - Prob. 2SACh. 7 - Prob. 3SACh. 7 - Prob. 4SACh. 7 - Prob. 5SACh. 7 - Prob. 6SACh. 7 - Prob. 7SACh. 7 - Prob. 8SACh. 7 - Prob. 9SACh. 7 - Prob. 10SA
Ch. 7 - Prob. 11SACh. 7 - Prob. 12SACh. 7 - Prob. 13SACh. 7 - Prob. 14SACh. 7 - Prob. 15SACh. 7 - Prob. 1MCCh. 7 - Prob. 2MCCh. 7 - Prob. 3MCCh. 7 - Prob. 4MCCh. 7 - Prob. 5MCCh. 7 - Prob. 6MCCh. 7 - Prob. 7MCCh. 7 - Prob. 8MCCh. 7 - Prob. 9MCCh. 7 - Prob. 10MCCh. 7 - Prob. 11MCCh. 7 - Prob. 12MCCh. 7 - Prob. 13MCCh. 7 - Prob. 14MCCh. 7 - Prob. 15MCCh. 7 - Prob. 16MC
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- Recessive genetic disorders are more frequent than disorders inherited as dominant because : a) carriers are not eliminated by the disease before reproduction b ) people carrying dominant genetic disorders always die before birth c ) dominant genetic disorders are never expressed in males e ) recessive genetic disorders are limited to persons of the same ethnicityarrow_forward7)Homozygote is a)an individual who has two copies of the same allele for a particular gene b)an individual who has to different alleles for a particular gene c)an individual who has one copy of the most common allele for a particular gene d)an individual who has one copy of the least common allele for a particular genearrow_forwardWhich statement is false when considering alleles and genes? a) A given gene can have many different possible alleles. b) Alleles are alternative forms or variants of genes. c) Individuals can be homozygous or heterozygous, and this refers to which alleles they have for a particular gene. d) An allele is the same thing as a gene.arrow_forward
- For an X-linked recessive disease where the father is unaffected: a) An affected father cannot pass the disease mutation on to his daughters. b) all affected mothers will be heterozygous at the trait locus. c) a homozygous affected mother will have only affected male offspring. d) a homozygous affected mother will have only affected female offspring. e) if a homozygous affected mother mates with an unaffected father, 75% (on average) of the male offspring will be affected.arrow_forwardFor an X-linked recessive disease, if an affected male is crossed with an unaffected female who is homozygous for the wild-type allele at the disease gene, then the percentage of male offspring that will be unaffected is: a) 0% b) 50% c) 100% d) 25% e) 33%arrow_forwardWhich of the following is an example of how genotype and environmental factors can work together to determine phenotype? O a) Temperature-senitive mutations O b) Nutritional factors resulting in epigenetic modification of genes c) Sex-influenced inheritance O d) Both A and B O e) Both A and Carrow_forward
- 6)Heterozygote is a)an individual who has two copies of the same allele for a particular gene b)an individual who has one copy of the most common allele for a particular gene c)an individual who has to different alleles for a particular gene d)an individual who has one copy of the least common allele for a particular genearrow_forwardIf a single expressed gene can affect multiple traits at once, what would be the most precise manner of referring to this phenomenon? a) Polygenic. b) Monogenic. c) Pleiotropic. d) Polytropic.arrow_forwardGenetic Markers are___Portions of a ___whose inheritance patterns can be followed A) unidentifiable, chromosome B) Unidintifiable, genes C) Identifiable, chromosome D) identifiable, genesarrow_forward
- a man has simpson syndrome, an addiction to certain television series. his wife does not have this syndrome. the couple has four children. A) can this syndrome be caused by autosomal recessive gene? B) Can it be caused by an x linked recessive allele ? C) What about wiggly ears?arrow_forwardIn cats, long hair is recessive to short hair. A homozygous short haired male is mated with a long haired female. a) Show the genotypes of the parents, using proper notation. b) What will their kittens look like? What is the best example of genotype: a) the physical appearance of an organism b) the length of stem in a pea plant c) TT d) a short-haired cat a) Show the genotypes of the parents, using proper notation. b) What will their kittens look like?arrow_forward32) Which term correctly describes the phenomenon that is taking place when a single gene influences two or more seemingly unrelated phenotypic traits? A) Epistasis B) Pleiotropy C) Multi-allelic D) Polygenetic traits genesarrow_forward
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