Evolution Variation & Mutation I Crossword Puzzle

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NATURAL SELECTION : To Darwin, this is the mechanism that directs evolution.
VARIATION : The production of this is what Darwin considered to be tbe first step of the two-step process of natural selection.
ENVIRONMENT : The testing of variation by this is what Darwin considered to be tbe second step of the two-step process of natural selection.
GENETICS : Darwin could not explain the source of variation, nor how various traits were passed on from one generation to the next because he had no knowledge of this.
GENETIC : These types of variations are caused by different combinations of alleles in genes.
GENOTYPES : This term represents the genetic code; the different possible alleles combinations for a particular gene.
PHENOTYPES : This term represents the physical manifestation of the genotype for a particular gene.
GENE POOL : This is all the genes available within an inbreeding group; a population or an entire species.
GENOME : This is the set of alleles that one organism has in its DNA.
MUTATION : This is the only source of new genes, which must occur in gametes for them to be passed on to offspring.
MULTIPLICATION : In this type of chromosomal mutation, an irregularity in cell division causes the number of chromosomes to go from 2N to 3N, 4N or even higher.
POLYPLOIDY : Also known as whole-genome duplication, this is usually an evolutionary dead end.
FRAGMENTATION : In this type of chromosomal mutation, the number of chromosomes remains constant, while alterations in structure take place in one or more chromosomes.
DELETION : In this type of chromosome fragmentation, a piece of chromosome breaks off and becomes lost.
CRI DU CHAT : This is a common disorder due to deletion mutation in humans.
TRANSLOCATION : This type of chromosome fragmentation occurs when the broken-off piece of chromosome becomes attached to a non-homologous chromosome.
DOWN SYNDROME : This is a common disorder due to translocation mutation in humans.
DUPLICATION : This type of chromosome fragmentation occurs when the broken-off piece of chromosome becomes attached its homologous chromosome.

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QUESTIONS LIST:

natural selection : to darwin, this is the mechanism that directs evolution.
variation : the production of this is what darwin considered to be tbe first step of the two-step process of natural selection.
environment : the testing of variation by this is what darwin considered to be tbe second step of the two-step process of natural selection.
genetics : darwin could not explain the source of variation, nor how various traits were passed on from one generation to the next because he had no knowledge of this.
genetic : these types of variations are caused by different combinations of alleles in genes.
genotypes : this term represents the genetic code; the different possible alleles combinations for a particular gene.
phenotypes : this term represents the physical manifestation of the genotype for a particular gene.
gene pool : this is all the genes available within an inbreeding group; a population or an entire species.
genome : this is the set of alleles that one organism has in its dna.
mutation : this is the only source of new genes, which must occur in gametes for them to be passed on to offspring.
multiplication : in this type of chromosomal mutation, an irregularity in cell division causes the number of chromosomes to go from 2n to 3n, 4n or even higher.
polyploidy : also known as whole-genome duplication, this is usually an evolutionary dead end.
fragmentation : in this type of chromosomal mutation, the number of chromosomes remains constant, while alterations in structure take place in one or more chromosomes.
deletion : in this type of chromosome fragmentation, a piece of chromosome breaks off and becomes lost.
cri du chat : this is a common disorder due to deletion mutation in humans.
translocation : this type of chromosome fragmentation occurs when the broken-off piece of chromosome becomes attached to a non-homologous chromosome.
down syndrome : this is a common disorder due to translocation mutation in humans.
duplication : this type of chromosome fragmentation occurs when the broken-off piece of chromosome becomes attached its homologous chromosome.