. Flashcards
(15 cards)
What are the two types of variation discussed?
DISCONTINUOUS and CONTINUOUS variation
What is an example of discontinuous variation?
Pea colour in Mendel’s pea plants
How are traits inherited according to the text?
Traits are controlled by groups of genes, not a single gene
What is an example of a trait influenced by multiple genes?
Eye colour
What is continuous variation?
Traits controlled by multiple genes in nature
In continuous variation, what contributes to a phenotype?
A group of genes with additive or negative effects
What are some examples of traits that exhibit continuous variation?
- Skin colour
- Hair colour
- Height
What did Mendel focus on in his studies?
Inheritance through discontinuous variation
What is a dihybrid cross?
Looking at how someone inherited 2 pairs of alleles
How many types of gametes can a heterozygous individual for 2 characteristics produce?
4 types of gametes
What are the possible gametes produced by a RrYy individual?
- RY
- rY
- Ry
- ry
What is the Law of Independent Assortment?
Each allele is inherited independently of each other if on different chromosomes
True or False: Parents are equally likely to produce any of the 4 gametes.
True
Fill in the blank: In the genotype RrYy, the individual is ______ for two characteristics.
heterozygous
What is the genotype of the parental generation in the example given?
RrYy x RrYy
