Biogeography Essay
EXAM 3
Importance in the study of ________in understanding evolution -Biogeography
Human birth weight is a classic example of the result of
-Stabilizing Selection
In humans x-linked traits
-Occur on the x chromosome
“Survival of the fittest” may be a misleading phrase to describe the process of evolution by natural selection because -Survival matters less to the natural selection then reproductive success does How can 2 pea plants that have different genotypes for seed color be identical in phenotypes? -½ plants could be homozygous for the dominant allele while the other one could be heterozygous An example of convergent evolution it can be demonstrated that organisms of the 2 groups that converged -Occupy similar environments
The …show more content…
origin of all genetic variation is
-Mutation
Y-linked genes include a gene that produces hairy ears. A male with hairy ears should pass this trait -Only to his sons
Which statement is not important to Darwin’s theory of natural selection? -Offspring tend to inherit characteristics acquired by their parents during a lifetime Most genes come in alternative forms called
-Alleles
Which is not true about Gregor Mendel
-He understood basic concepts about DNA replication
In humans the sex of an offspring is ordinarily determined by the -Sex chromosome carried by the sperm cell
Most mosquitoes are resistant to pesticides. Resistance arose because -Some individuals were resistant to the pesticides before they were used and those mosquitoes were most likely to survive and reproduce Natural selection can only act on traits
-That are heritable
The impact of a stage gene on move the 1 characteristics is called -Pleiotropy
Modern cheetahs are almost always genetically identical. This is bc 10,000 years ago they experienced -A bottleneck
Mendel performed his famous experiment on
-Pea plants (garden peas)
What can amniocentesis tell you about a fetus?
-Male or female + for Down syndrome
In many species of birds, males are xx and females are xz. With birds like these, who’s more likely to display sex-linked recessive traits? -Females
Albinism (lack of skin or hair pigment) is caused by a recessive autosomal allele.
A women and man both normally pigmented have an albino child. What’s the genotype? -Homozygous recessive
Embryos of certain species of vertebrates look alike at certain stages of development supports -All vertebrates descends from a common ancestor
Evolution
-Change in frequency of alleles in a pop. Over time
In snapdragons there’s an allele for flower color “c” that produces no pigment. A plant “CwCw” will produce _______flowers -White
Red flower, dominant, white recessive. Can it be white?
-O%
Vestigial structure
-In bats for liquids diets eye sockets in eyeless fish pelvic bones in whales Darwin observed that tortoises in a nearby island belonged to same biological species. How would he know? -Local people told him
Down syndrome results from what chromosome abnormality
-All or part of a 3rd copy of chromosome 21
Change in light to dark due to soot
-Directional selection
Population bottleneck occurs when
-Pop size is significantly reduced, pop killed off, loss within single generation Quickly adapting species
-Already had some traits that were adaptive to the new environmental conditions Autosomal recessive traits
-Can skip
generations
X between red and white eyes. Red eyes
-Dominant
Main trunk at the bottom of evolutionary tree
-Earliest common ancestors of all the living organisms
Incest A can’t mate with B because they were fertile at different times. Example of -Temporal isolation
A plant with pink flowers is allowed to self-pollinate. Generation after generation. It produces pink ex -True-bleeding plant
Not characteristics of turners syndrome
-XX genotype
_______Selection favors organisms that have character values at both extremes of phenotypic distribution -Disruptive
Not capable of evolving
-Rose bush
Which level would contain members most similar
-Genes
Genetic condition that causes sickle-cell anemia can protect against -Malaria
What can’t produce a child with B blood?
-O x O
Importance in the study of ________in understanding evolution -Biogeography
Human birth weight is a classic example of the result of
-Stabilizing Selection
In humans x-linked traits
-Occur on the x chromosome
“Survival of the fittest” may be a misleading phrase to describe the process of evolution by natural selection because -Survival matters less to the natural selection then reproductive success does How can 2 pea plants that have different genotypes for seed color be identical in phenotypes? -½ plants could be homozygous for the dominant allele while the other one could be heterozygous An example of convergent evolution it can be demonstrated that organisms of the 2 groups that converged -Occupy similar environments
The …show more content…
origin of all genetic variation is
-Mutation
Y-linked genes include a gene that produces hairy ears. A male with hairy ears should pass this trait -Only to his sons
Which statement is not important to Darwin’s theory of natural selection? -Offspring tend to inherit characteristics acquired by their parents during a lifetime Most genes come in alternative forms called
-Alleles
Which is not true about Gregor Mendel
-He understood basic concepts about DNA replication
In humans the sex of an offspring is ordinarily determined by the -Sex chromosome carried by the sperm cell
Most mosquitoes are resistant to pesticides. Resistance arose because -Some individuals were resistant to the pesticides before they were used and those mosquitoes were most likely to survive and reproduce Natural selection can only act on traits
-That are heritable
The impact of a stage gene on move the 1 characteristics is called -Pleiotropy
Modern cheetahs are almost always genetically identical. This is bc 10,000 years ago they experienced -A bottleneck
Mendel performed his famous experiment on
-Pea plants (garden peas)
What can amniocentesis tell you about a fetus?
-Male or female + for Down syndrome
In many species of birds, males are xx and females are xz. With birds like these, who’s more likely to display sex-linked recessive traits? -Females
Albinism (lack of skin or hair pigment) is caused by a recessive autosomal allele.
A women and man both normally pigmented have an albino child. What’s the genotype? -Homozygous recessive
Embryos of certain species of vertebrates look alike at certain stages of development supports -All vertebrates descends from a common ancestor
Evolution
-Change in frequency of alleles in a pop. Over time
In snapdragons there’s an allele for flower color “c” that produces no pigment. A plant “CwCw” will produce _______flowers -White
Red flower, dominant, white recessive. Can it be white?
-O%
Vestigial structure
-In bats for liquids diets eye sockets in eyeless fish pelvic bones in whales Darwin observed that tortoises in a nearby island belonged to same biological species. How would he know? -Local people told him
Down syndrome results from what chromosome abnormality
-All or part of a 3rd copy of chromosome 21
Change in light to dark due to soot
-Directional selection
Population bottleneck occurs when
-Pop size is significantly reduced, pop killed off, loss within single generation Quickly adapting species
-Already had some traits that were adaptive to the new environmental conditions Autosomal recessive traits
-Can skip
generations
X between red and white eyes. Red eyes
-Dominant
Main trunk at the bottom of evolutionary tree
-Earliest common ancestors of all the living organisms
Incest A can’t mate with B because they were fertile at different times. Example of -Temporal isolation
A plant with pink flowers is allowed to self-pollinate. Generation after generation. It produces pink ex -True-bleeding plant
Not characteristics of turners syndrome
-XX genotype
_______Selection favors organisms that have character values at both extremes of phenotypic distribution -Disruptive
Not capable of evolving
-Rose bush
Which level would contain members most similar
-Genes
Genetic condition that causes sickle-cell anemia can protect against -Malaria
What can’t produce a child with B blood?
-O x O