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"Heterozygous" means having one copy each of the dominant and the recessive allele governing a particular trait.
"Dihybrid" means that you are following the inheritance of two traits ("di-" = 2).
For example: in the peas that Mendel studied, round seeds (allele R) are dominant over wrinkled (r). So a heterozygous plant has the genotype Rr. Yellow seeds (Y) are dominant over green (y). In experiments following these two traits (seed shape and seed color) a dihybrid heterozygous individual therefore has the genotype RrYy.
A dihybrid cross involves observation of two traits, e.g.
RRYY x rryy
which would yield an F1 entirely made up of RrYy individuals.
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A cross that considers one pair of contrasting traits?
A dihybrid cross is the cross that involves parents that differ in two traits.
What did mendel perform when he crossed plants that were heterozygous for two traits?
When Mendel crossed a true-breeding short plant with a true-breeding tall plant, all the offspring were tall. Which term describes the gene for tallness?
How does a monohybrid differ from a dihybrid with respect to allele pairs?
monohybrid is a cross between two heterozygous (Aa x Aa), they are usually controlled by different alleles of the same gene. A monohybrid cross compares only one trait. while Dihybrid is a cross between F1 offsprings of two individuals that differ in two traits. Dihybrid croos are often used to test for dominant and recessive genes in two separate characteristics.
What is an organism that is heterozygous for two traits?
An organism that is heterozygous for two traits means that it contains both the dominant allele and the recessive allele for both of the traits in question. For example, take a plant that produces peas. The gene that produces yellow seeds (denoted Y) is dominant, the gene for green seeds (y) is recessive. The gene that produces round seeds is dominant (R), the gene for wrinkled seeds (r) is recessive. So if this organism was heterozygous for both traits its genotype would be: Yy/ Rr Which means it has the allele for yellow seeds and the allele for green seeds (trait one), and also has the allele for round seeds and the allele for wrinkled seeds (trait two). Its phenotype (the traits it displays) will be yellow round seeds, as these are the dominant traits.
What does does heterozygous mean?
Heterozygous means that you are carrying 1 dominant trait and 1 recessive trait.If an allelic pair has one dominant and other recessive gene it is called heterozygous.
What can be said of a fully heterozygous dihybrid cross?
All of these choices are possible combinations in a dihybrid cross
What is a heterozygous genotype for a dihybrid?
AaBb usually, but can also be AAbb or aaBB depending on what they ask you is heterozygous. To be heterozygous for one trait, it's AaBb. To have a heterozygous genotype, unless specified, it can be any of the above.
When Mendel crossed plants that were heterozygous for two traits he performed a?
dihybrid cross :D
How do you figure out the combinations for a heterozygous parent for two traits?
A heterozygous parent with two traits on random mating will have the off springs in dihybrid ratios of genetic segregation.
A cross that considers one pair of contrasting traits?
A dihybrid cross is the cross that involves parents that differ in two traits.
How many phenotypically different types of offspring are possible in a dihybrid cross between two heterozygous individuals?
3
When does a two trait test cross occur?
A dihybrid cross is one in which two distinctly different traits are crossed. Each adult produces 4 gamete types of equal frequency, heterozygous dihybrid.
What term describes the parents in a mono-hybrid cross?
The term is: heterozygous parents A monohybrid cross involves a single parent, whereas a dihybrid cross. The law of segregation requires having two or more generations to describe.
What did mendel perform when he crossed plants that were heterozygous for two traits?
When Mendel crossed a true-breeding short plant with a true-breeding tall plant, all the offspring were tall. Which term describes the gene for tallness?
What are the ratios of a heterozygous dihybrid cross and what is the probability of having the recessive trait show?
9:3:3:1 The probability of having both recessive traits is 1:16.
How does a monohybrid differ from a dihybrid with respect to allele pairs?
monohybrid is a cross between two heterozygous (Aa x Aa), they are usually controlled by different alleles of the same gene. A monohybrid cross compares only one trait. while Dihybrid is a cross between F1 offsprings of two individuals that differ in two traits. Dihybrid croos are often used to test for dominant and recessive genes in two separate characteristics.
What is an organism that is heterozygous for two traits?
An organism that is heterozygous for two traits means that it contains both the dominant allele and the recessive allele for both of the traits in question. For example, take a plant that produces peas. The gene that produces yellow seeds (denoted Y) is dominant, the gene for green seeds (y) is recessive. The gene that produces round seeds is dominant (R), the gene for wrinkled seeds (r) is recessive. So if this organism was heterozygous for both traits its genotype would be: Yy/ Rr Which means it has the allele for yellow seeds and the allele for green seeds (trait one), and also has the allele for round seeds and the allele for wrinkled seeds (trait two). Its phenotype (the traits it displays) will be yellow round seeds, as these are the dominant traits.
