II-TERM QUESTION BANK (2016-17) Std: X Sub: Biology Topic : 1
... b) What must be the percentage of white flower plant in F2 generation if flowers of F1 plants are self pollinated? c) State the expected ratio of the genotypes BB and Bb in the F2 progeny. 8. How are fossils formed? Describe, in brief, two methods of determining the age of fossils. 9. Variation is b ...
... b) What must be the percentage of white flower plant in F2 generation if flowers of F1 plants are self pollinated? c) State the expected ratio of the genotypes BB and Bb in the F2 progeny. 8. How are fossils formed? Describe, in brief, two methods of determining the age of fossils. 9. Variation is b ...
Gene Pool
... • Choosing mates is ____________ random; mates are often chosen based on certain criteria. • Most individuals breed with others of the ____________________________ that share the same ecosystem increased inbreeding. • Limits the frequency of the expression of certain alleles. 4) Mutations • Increa ...
... • Choosing mates is ____________ random; mates are often chosen based on certain criteria. • Most individuals breed with others of the ____________________________ that share the same ecosystem increased inbreeding. • Limits the frequency of the expression of certain alleles. 4) Mutations • Increa ...
CHAPTER 16 POPULATION GENETICS AND SPECIATION Genetic
... Disruption of Genetic Equilibrium 1. Mutations can affect genetic equilibrium by producing totally new alleles for a trait. Because natural selection operates only on genes that are expressed, it is very slow to eliminate harmful recessive mutations. 2. Gene flow- The second requirement for genetic ...
... Disruption of Genetic Equilibrium 1. Mutations can affect genetic equilibrium by producing totally new alleles for a trait. Because natural selection operates only on genes that are expressed, it is very slow to eliminate harmful recessive mutations. 2. Gene flow- The second requirement for genetic ...
Evolution Review
... 10. In the Hawaiian Islands, there are thousands of species of plant and animals that are found nowhere else on Earth. How would you explain this phenomenon, and what is the name of this process? 11. In order for species to remain distinct, they must remain reproductively isolated. Describe a pre-zy ...
... 10. In the Hawaiian Islands, there are thousands of species of plant and animals that are found nowhere else on Earth. How would you explain this phenomenon, and what is the name of this process? 11. In order for species to remain distinct, they must remain reproductively isolated. Describe a pre-zy ...
CASE STUDY REPORT
... of plants and animals you might encounter. Include information about the weather of each biome. 10 sentence minimum required. ...
... of plants and animals you might encounter. Include information about the weather of each biome. 10 sentence minimum required. ...
Keystone Evolution Quiz
... 11. If a species in one area were to be divided into two distinct groups when the continent split into two separate landmasses, what would probably happen to that species? (1 point) The two groups would become more and more different until they became separate species after many, many generations. T ...
... 11. If a species in one area were to be divided into two distinct groups when the continent split into two separate landmasses, what would probably happen to that species? (1 point) The two groups would become more and more different until they became separate species after many, many generations. T ...
Keystone: Evolution Review Quiz 1. Tiny remnants of leg bones in
... 11. If a species in one area were to be divided into two distinct groups when the continent split into two separate landmasses, what would probably happen to that species? (1 point) The two groups would become more and more different until they became separate species after many, many generations. T ...
... 11. If a species in one area were to be divided into two distinct groups when the continent split into two separate landmasses, what would probably happen to that species? (1 point) The two groups would become more and more different until they became separate species after many, many generations. T ...
Document
... Speciation is a result of divergent natural (ecological) or sexual selection. Genetic drift may accelerate the process of divergence during founder events. ...
... Speciation is a result of divergent natural (ecological) or sexual selection. Genetic drift may accelerate the process of divergence during founder events. ...
CPS - General Biology Review.cps
... the allele for tall plants is dominant the allele for short plants is dominant the allele for tall plants is recessive they were true-breeding like their parents ...
... the allele for tall plants is dominant the allele for short plants is dominant the allele for tall plants is recessive they were true-breeding like their parents ...
• Evolution happens when populations of organisms with inherited
... barriers and isolation. • Species isolated by post-zygotic barriers will subsequently evolve pre-zygotic barriers. • Why? ...
... barriers and isolation. • Species isolated by post-zygotic barriers will subsequently evolve pre-zygotic barriers. • Why? ...
HW_CH16-Biol1406.doc
... b. A river that has long divided two populations of mice is diverted by an earthquake, and the two mouse populations come into contact and breed together. The hybrid offspring, however, are sterile. c. In a bird population, there is disruptive selection for habitat: one group adapts to the treetops, ...
... b. A river that has long divided two populations of mice is diverted by an earthquake, and the two mouse populations come into contact and breed together. The hybrid offspring, however, are sterile. c. In a bird population, there is disruptive selection for habitat: one group adapts to the treetops, ...
Evolution Fill
... The Evolution of Species Speciation Occurs when members of __________ populations no longer _____________ to produce fertile ___________ Creates new ____________ Geographic Isolation ____________ ____________ divides a population; Examples? Reproductive Isolation Occurs when formerly i ...
... The Evolution of Species Speciation Occurs when members of __________ populations no longer _____________ to produce fertile ___________ Creates new ____________ Geographic Isolation ____________ ____________ divides a population; Examples? Reproductive Isolation Occurs when formerly i ...
ch15
... the rear, and with one mighty blow levels the population with the food of the world..." An Essay on the Principle of Population. DARWIN'S THEORY OF NATURAL SELECTION. Fact #1 - Without constraints, populations will grow exponentially, producing an ever more rapidly growing number of organisms. Fact ...
... the rear, and with one mighty blow levels the population with the food of the world..." An Essay on the Principle of Population. DARWIN'S THEORY OF NATURAL SELECTION. Fact #1 - Without constraints, populations will grow exponentially, producing an ever more rapidly growing number of organisms. Fact ...
15.2 Mechanisms of Evolution
... Divergent Evolution – pattern in which species that once were similar to an ancestral species ...
... Divergent Evolution – pattern in which species that once were similar to an ancestral species ...
Heredity - Appoquinimink High School
... • The study of heredity in biology is called genetics. • Gregor Mendel 1822 – 1884 was a priest and scientist, and is often called the father of genetics for his study of the inheritance of certain traits in pea plants. Mendel showed that the inheritance of these traits follows particular laws. ...
... • The study of heredity in biology is called genetics. • Gregor Mendel 1822 – 1884 was a priest and scientist, and is often called the father of genetics for his study of the inheritance of certain traits in pea plants. Mendel showed that the inheritance of these traits follows particular laws. ...
Speciation Powerpoint
... making evidence of speciation visible? 1) Adaptive radiation (also called divergent evolution): When one species gives rise to many species in response to the creation of a new habitat or another ...
... making evidence of speciation visible? 1) Adaptive radiation (also called divergent evolution): When one species gives rise to many species in response to the creation of a new habitat or another ...
word - marric.us
... A It will accelerate the appearance of new traits. B It will promote the survival of chimpanzees with beneficial traits. C It will increase the number of alleles for specific traits. D It will reduce genetic diversity. 7. A species of finch has been studied on one of the geographically isolated Gala ...
... A It will accelerate the appearance of new traits. B It will promote the survival of chimpanzees with beneficial traits. C It will increase the number of alleles for specific traits. D It will reduce genetic diversity. 7. A species of finch has been studied on one of the geographically isolated Gala ...
Ch. 5 Evolution of Biodiversity
... populations of genetically modified organisms. • Scientists can insert genes with desirable traits into organisms w/o them to produce genetically modified organisms. • These organisms will pass on the new traits to their offspring. • Obviously this is much quicker than traditional plant breeding whi ...
... populations of genetically modified organisms. • Scientists can insert genes with desirable traits into organisms w/o them to produce genetically modified organisms. • These organisms will pass on the new traits to their offspring. • Obviously this is much quicker than traditional plant breeding whi ...
Activity 97 Power Point
... • You can NOT choose your traits. Your genes are passed to you by your parents at conception. These traits are INHERITED and not Acquired. ...
... • You can NOT choose your traits. Your genes are passed to you by your parents at conception. These traits are INHERITED and not Acquired. ...
questions
... 21) Which of the following statements about speciation is not true? a) speciation need not occur between isolated populations b) the purpose of evolutionary change is to form new species c) speciation can happen very rapidly d) speciation can occurs when two populations diverge e) genetic isolation ...
... 21) Which of the following statements about speciation is not true? a) speciation need not occur between isolated populations b) the purpose of evolutionary change is to form new species c) speciation can happen very rapidly d) speciation can occurs when two populations diverge e) genetic isolation ...
Explain how humans impact variation in other species
... Distinguish between the following phyla of plants, using simple external recognition features: bryophyta, filicinophyta, coniferophyta and angiospermophyta. Distinguish between the following phyla of animals, using simple external recognition features: porifera, cnidaria, platyhelminthes, annelida, ...
... Distinguish between the following phyla of plants, using simple external recognition features: bryophyta, filicinophyta, coniferophyta and angiospermophyta. Distinguish between the following phyla of animals, using simple external recognition features: porifera, cnidaria, platyhelminthes, annelida, ...
Hybrid (biology)
In biology a hybrid, also known as cross breed, is the result of mixing, through sexual reproduction, two animals or plants of different breeds, varieties, species or genera. Using genetic terminology, it may be defined as follows. Hybrid generally refers to any offspring resulting from the breeding of two genetically distinct individuals, which usually will result in a high degree of heterozygosity, though hybrid and heterozygous are not, strictly speaking, synonymous. a genetic hybrid carries two different alleles of the same gene a structural hybrid results from the fusion of gametes that have differing structure in at least one chromosome, as a result of structural abnormalities a numerical hybrid results from the fusion of gametes having different haploid numbers of chromosomes a permanent hybrid is a situation where only the heterozygous genotype occurs, because all homozygous combinations are lethal.From a taxonomic perspective, hybrid refers to: Offspring resulting from the interbreeding between two animal species or plant species. See also hybrid speciation. Hybrids between different subspecies within a species (such as between the Bengal tiger and Siberian tiger) are known as intra-specific hybrids. Hybrids between different species within the same genus (such as between lions and tigers) are sometimes known as interspecific hybrids or crosses. Hybrids between different genera (such as between sheep and goats) are known as intergeneric hybrids. Extremely rare interfamilial hybrids have been known to occur (such as the guineafowl hybrids). No interordinal (between different orders) animal hybrids are known. The third type of hybrid consists of crosses between populations, breeds or cultivars within a single species. This meaning is often used in plant and animal breeding, where hybrids are commonly produced and selected, because they have desirable characteristics not found or inconsistently present in the parent individuals or populations.↑ ↑ ↑ ↑