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Chapter 16 (Genetics) (Multiple sets of chromosomes and Gene Families…
Chapter 16 (Genetics)
Multiple sets of chromosomes and Gene Families
Animals have diploid body cells
Animals have haploid gametes
Cells may not make it to mitosis stage
Plants having more than two sets of chromrosomes is an example of a poyploid
Multiple copies of a gene is a gene family
Picture Example
Overview of DNA
Genetics is science of inheritance
Chemical basis of inheritance of genetics is a gene
Alleles are alternate forms of a gene
Genotypes are the types of allele
Genotypes are the physical traits
Replication of DNA
Beginning of Replication
Chromatin becomes less compact
THEN, DNA double helix is cut and strands separate from each other creating a bubble
Replicon
Name of the bubble
RNA is a messenger amongst all living cells
Single Strand
DNA
SIngle Strand difference between these
Carries genetic information
Double Strand
Dihybrid Crosses
Independent assortment occurs
Not highly likely in this situation
This is when alleles of a gene move independently form the other alleles
Genes on the same chromosome
If two genes are present amongst a chromosome, they do not undergo independent assortment
When genes are not close together then crossing occurs
