Mendel & Probability
Vocabulary
Using Symbols in Genetics
Co-dominance and Incomplete Dominance
Miscellaneous
100
What did Mendel do with short and tall pea plants in order to study their characteristics?
He cross-pollinated them.
100
What are factors that control traits called?
Genes
100
How are dominant alleles represented?
capital letters
100
What occurs when there is a blending of the trait or color?
incomplete dominance
100
Which allele always shows up when it is present?
the dominant allele
200
In Mendel's experiments, what proportion of the plants in the F2 generation had a trait that did not appear in the F1 generation?
1/4
200
What are different forms of a trait called?
Alleles
200
How are recessive alleles represented?
lower case letters
200
What color feathers would the offspring would a purebred white chicken and a purebred black chicken have?
black and white
200
Which allele is covered up whenever a dominant allele is present?
the recessive allele
300
What did Mendel use to predict what percent of offspring would show a certain trait?
probability
300
What are the offspring of parents that have different alleles for a trait called?
hybrids
300
What is the genotype for a tall plant with two dominant alleles?
TT
300
What percent of the offspring of the red cows and white cows are roan?
100%
300
What is an inherited trait? Give one example.
A trait you inherit from your parents
400
What is probability?
the likelihood that a particular event will occur
400
What is an organism’s physical appearance called?
Phenotype
400
What is the genotype for a tall plant with one dominant and one recessive allele?
Tt
400
Besides black and white chickens, give another examples of co-dominance.
Roan cattles (the offspring of red cows and white cows)
400
What is an acquired trait? Give one example.
A trait you learn, buy, or get from much practice
500
What can you use to predict probabilities?
a punnett square
500
What is an organism’s genetic makeup called?
Genotype
500
What is the genotype for a short plant? What types of alleles are present?
tt recessive
500
What type of inheritance pattern due alleles that are neither dominant nor recessive produce?
co-dominance
500
What is the difference between heterozygous and homozygous organisms? Give an example of each.
Heterozygous organisms have 2 different alleles for a trait. (Tt) Homozygous organisms have two identical alleles for a trait. (TT or tt)
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