monohybrid, dihybrid, test cross
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Helps predict possible offspring of a cross between two organisms with known genotypes | punnett square
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| What do you call a genetic cross such as the following Aa x Aa | monohybrid cross
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| both of the parents in a monohybrid cross can be described as... | heterozygous for a single trait
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| What letter in the symbol of a genotype goes first in an individual that is called a monohybrid | the capital letter goes first Aa
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| Using Y= yellow and y = green.... give the phenotype ratio for a monohybrid cross | 3/4 should be dominant or yellow and 1/4 should be green or recessive
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| An organism that is hybrid for two traits is called a/an | dihybrid
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| An organism that is heterozygous for one trait is called a/an | monohybrid
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| If Y= yellow and y= green..... and R= round and r = wrinkled...Describe the genotype of a dihybrid | YyRr
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| If Y= yellow and y= green... Describe the parents of a dihybrid cross ( give their genotypes) ____x_____ | YyRr x YyRr
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| If an individual is described as YyRr ... How many letters would be in the individual's gametes | 2 ( YR Yr yR or yr are possible )
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| What gametes are possible for an individual describe as Aa | It could make big A or little a
since meiosis occurs to separate the genes for the parent donates one per trait
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| Using Y= yellow y= green and R= round and r= wrinkled... what do you know if the phenotype ratio turns out to be 9/16 yellow and round 3/16 yellow and wrinkled 3/16 green and round and 1/16 green and wrinkled | The parents are YyRr x YyRr ( a dihybrid cross)
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| Using Y= yellow and y= green... What do you know if the phenotype ratio is 3/4 yellow to 1/4 green | the parents are Yy x Yy ( a monohybrid cross)
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| If Y= yellow y= green and R= round and r= wrinkled if the parents are YyRr x YyRr... what is the expected phenotype ratio | 9/16 yellow round 3/16 yellow wrinkled 3/16 green round and 1/16 green wrinkled
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| If Y= yellow and y= green... If the parents are Yy x Yy what is the expected phenotype ratio | 3/4 yellow 1/4 green
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| If Y= yellow and y= green and R= round and r= wrinkled ... In a cross between YyRr x YyRr , How many are expected to be all recessive green and wrinkled | 1/16
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| Which one of Mendel's laws was developed while he worked with 2 traits at once | Law of independent assortment
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| The law of independent assortment is similar to another one of Mendel's laws but deals with two traits | Law of segregation ( assortment means about the same thing as segregation)
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| The law of independent assortment has been modified to state that it only works ... | if the genes are on separate chromosomes
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| State the Law of Independent Assortment | Genes for two traits segregate into gametes without bothering each other if they are on separate chromosomes... in YyRr the Y can go with the R or the r the y can go with the R or y.... For two traits each gamete would have two genes..one / trait)
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