XP patients cannot excise pyrimidine dimers and other bulky adducts. Mutations occur in one of eight genes called XPA to XPG

TLS Online TPP Program

#Id: 6979

#Unit 8. Inheritance Biology

Uniparental Disomy Inheritance of both chromosomes of a homologous pair from a single parent.  Many cases of uniparental disomy probably originate as trisomies. 

TLS Online TPP Program

#Id: 6980

#Unit 8. Inheritance Biology

Polyploidy 

Some organisms possess more than two sets of chromosomes—they are polyploid.  Allopolyploidy Condition in which the sets of chromosomes of a polyploid individual are derived from two or more species.  Autopolyploidy Condition in which all the sets of chromosomes of a polyploid individual are derived from a single species.

TLS Online TPP Program

#Id: 2140

#Unit 9. Diversity of Life Forms

Darwin have agreed that all animals with vertebrae form a single phylogenetic branch of species that share a common ancestor.

TLS Online TPP Program

#Id: 2141

#Unit 9. Diversity of Life Forms

Phylogenetic relationships among species are estimated from similarities and differences.

TLS Online TPP Program

#Id: 2142

#Unit 9. Diversity of Life Forms

Phylogenetic relationships are based on,

a. Plesiomorphic character

b. Apomorphic character

TLS Online TPP Program

#Id: 2143

#Unit 9. Diversity of Life Forms

Plesiomorphic character- Primitive/unchange from ancestor Synplesiomorphic character- Primitive share ancestral character