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Unit 7 Review Guide - Coggle Diagram
Unit 7 Review Guide
Autosomal Dominant/Recessive
both genders can have any combination of dominant and recessive traits
it is possible for recessive traits to skip a generation
requires two recessive genes to make a person affected
Lethal dominant/recessive
In either condition, two of the same alleles causes death of the offspring before birth
Dominant lethal means that if two of the dominant alleles are inherited, the offspring dies
Recessive lethal means that if two of the recessive alleles are inherited, the offspring dies
Sex-linked
typically males are more affected with a recessive trait
females are more affected by a dominant trait
y chromosome does not carry any traits
Meiosis
used to produce sex cells
produces haphloids
two rounds of PMAT
Karyotypes
nondisjunction; bad separation of chromosomes
balanced rearrangements versus unbalanced
46 chromosomes in total
Co-dominance/intermediate dominance
In codominant inheritance, two different versions (alleles) of a gene are expressed, and each version makes a slightly different protein
Both alleles influence the genetic trait or determine the characteristics of the genetic condition, and they both contribute to the phenotype of the organism.
Law of Dominance
a dominant trait will conceal the existence of a recessive trait
both alleles do not contribute to what is expressed except in the case of co-dominance
Dihybrid Crosses
happens when comparing two traits
Punnet square is 4 by 4
Law of Segregation
each parent contributes only one allele which is randomly chosen
Law of Independent Assortment
genes are passed on to offspring independently of one another