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Final Exam Crossword Compilation.doc

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Jon Houseman

Microevolution Crossword CHROMOSOMAL- Type of mutation that is more likely to increase variation in a population FIXED- Heavy selection pressure on a population will cause one allele to become this POINT- Type of mutation when only one nucleotide is changed FRAMESHIFT- Type of mutation where there is an addition of a single nucleotide in the sequence PHENOTYPE- The visible expression of the underlying genetic make up of an organism MECHANICAL- It is anatomically impossible for two different species to physically mate; an example of this type of isolation mechanism ALLELE- Alternate forms that a gene can take MICROEVOLUTION- Evolutionary change that results from changes in allele frequencies HETEROZYGOTES- Inbreeding results in a decrease in this genetic mix DELETION- When a gene sequence along a chromosome changes from abcdefg to abefg SPERM- The copulatory wheel in dragonflies is an example of this type of male competition LARGE- Genetic drift isn't as likely in this size of a population SEXUAL- Males and females often look different; it is an example of this type of dimorphism MEIOSIS- Crossing over occurs during this type of cell division NATURAL- If allele frequencies are to be stable in a population, this type of selection must not occur THIRD- Missense mutations rarely involve this nucleotide position in the codon NONSENSE- Type of mutation where a single nucleotide change codes for the stop codon POLYPLOID- Having more than the usual 2N set of chromosomes CROSSING OVER- In this process, sister chromatids on different chromosome pairs exchange DNA MIDDLE- This part of the range of variation is selected for in disruptive selection DUPLICATION- When the gene sequence along a chromosome changes from abcdefg to abcdecdefg MISSENCE- Type of mutation where single nucleotide changes alters only one codon INCOMPLETE- In some genetic crosses (RR x rr) the ration of visible traits is 1:2:1 in the F1 generation with two seemingly intermediate conditions; it is an example of this type of dominance GAMETIC ISOLATION- Even though pollen (male gamete) from a variety of different plant species land on the stigma (female), only those of the same species will ultimately fertilize the ovule (egg); it is an example of this type of isolation mechanism BELL- Under normal circumstances, the range of variation for a phenotype can be represented with this type of curve HOMOZYGOUS- If both alleles for a character are the same, the organism is considered to be this HETEROZYGOUS- If the alleles for a character are different, the organism is considered to be this for that trait MATE- By definition, organisms in two different species can't successfully do this ONE- Number of alleles for a gene that are found in the gametes NEUTRAL- Most point mutations are _______. HARDY- One of the 2 scientists that worked out the probability of allelic assortment within populations TEMPORAL- Different species of frogs sing their mating songs at different times of the day; it is an example of this type of isolating mechanism Organizing the Living World Crossword HOMOLOGOUS- Linnaeus classified organisms based on morphologically and structurally similar characters rather than differences; this term refers to these types of characters TAXA- Plural of taxon NATURAL- Synonym for evolutionary taxonomy COMMON- Every animal in a taxon shares this type of ancestor ITALIC- Special test formatting that you have to apply to a genus species name when typed DERIVED- In some animals in a taxon, the original characters that defined the group have been modified; they are now this type of character SYNAPOMORPHESIES- These derived characters are shared by all the members of the clade and are referred to as these MONOPHYLETIC- Cladistics emphasizes this type of relationship between the different taxa TAXON- A term that describes any of the major or minor groups in the classification system FUNGI- The kingdom of multicelled saprophytic organisms that have a cell wall composed of chitin ONE- Monophyletic groups have this number of ancestors WINGS- These appendages of bats and birds are homologous with our arms CONVERGENT- Two different taxa have similar looking structures that function in similar ways; it is an example of this type of evolution CLADE- A subset of organisms within a group that all have the same shared characters are referred to as this and give this method of classification its name POLYPHYLETIC- If different taxa are related to each other and the ancestor to the group is not included in the classification, they are referred to as this HOMOPLASY- Birds and insects both fly and have wings, but they don't share a common ancestor so their wings are considered as being this type of character LATIN- Genus and species names are written in this language ANIMALIA- The Kingdom of multicellular organisms that have to feed by swallowing other organisms whole or in chunks PLANTAE- The Kingdom of multicellular photosynthesizers ANCIENT- This type of taxonomy results in lists of different organisms PRIMITIVE- In a taxon, characters found in the ancestor of the group are considered this and it is not a statement on their value CLADISTICS- Phylogenetic systematics is also called this AB
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