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Mendel's Crosses

monohybrid, dihybrid, test cross

Helps predict possible offspring of a cross between two organisms with known genotypes punnett square
What do you call a genetic cross such as the following Aa x Aa monohybrid cross
both of the parents in a monohybrid cross can be described as... heterozygous for a single trait
What letter in the symbol of a genotype goes first in an individual that is called a monohybrid the capital letter goes first Aa
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
An organism that is hybrid for two traits is called a/an dihybrid
An organism that is heterozygous for one trait is called a/an monohybrid
If Y= yellow and y= green..... and R= round and r = wrinkled...Describe the genotype of a dihybrid YyRr
If Y= yellow and y= green... Describe the parents of a dihybrid cross ( give their genotypes) ____x_____ YyRr x YyRr
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 )
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
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)
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)
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
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
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
Which one of Mendel's laws was developed while he worked with 2 traits at once Law of independent assortment
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)
The law of independent assortment has been modified to state that it only works ... if the genes are on separate chromosomes
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 / trait)
Created by: shemehl



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