University:
High School
Course:
High School Genetics
Academic year:

2023
Views:

78

Pages:

8
Author:

SpaceCadet101

Advanced Genetics Problems Essential Questions 1. What is the difference between incomplete dominance and codominance? 2. What are sex-linked traits, and why are they seen more often in males? 3. What are multiple allele traits? How are blood types an example of a multiple allele trait? Incomplete Dominance • Neither allele is dominant! • Heterozygous offspring show a BLENDED phenotype Co Co--dominance • Both alleles are dominant! • Heterozygous offspring show BOTH traits at the same time!!! Multiple Allele Traits • More than 2 alleles are possible in the gene pool. • Example: Eye Color (Brown, Blue, Green), Blood Types Blood Types BLOOD TYPES Possible Genotypes A AA, AO B BB, BO AB AB O OO • Blood type problems combine: * Multiple Alleles (A,B, O) * Co-Dominance (A & B) * Simple Dominant/Recessive (O is recessive to A & B) Sex--Linked Traits Sex XN XN Y Xn XN XN XNXn XNY XnY • Genes that are carried on the X chromosome. • Affect males more than females!! • Males (XY) • Females (XX) • Example: Colorblindness (recessive) The Role of Environment • Many phenotypic characteristics are influenced by both genes (nature) and the environment (nurture) • Environmental factors that can influence genetic traits: – Availability of food (diet & nutrition) – Exposure to radiation – Exposure to chemicals & toxins – Disease