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LESSON N26
THEME: Interactions between non-allelic genes. Pleiotropy. Expressivity. Penetrance.
Task 1. Solve the tasks that modeling interaction between non-allelic genes.
1. Height is quantitative (polygenic) trait in humans. Height is controlled by three pairs of genes,
located in different chromosomes. A very tall person has 6 recessive genes (alala2a2a3a3) and
very shot person has 6 dominant genes (A1A1A2A2A3A3). What is the genotype of a medium-
height person?

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.

a- multicellular

b-eukaryotic

c-no cell wall

d-heterotrophic

e-autotrophic

regents of the university of california v. bakke, 438 u.s. 265 (1978), was a landmark decision by the supreme court of the united states. it upheld affirmative action, allowing race to be one of several factors in college admission policy.

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."