Kendi Shared "Genetics 2" - 32 Picmonics

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Genetics 2

Chromosome Forms
Characteristics
Chromatid
Sister Chromatids
Homologous Chromosomes
Tetrad
2 mins
Cell Cycle Phases
Characteristics
G0 Phase
Growth Arrest
G1 Phase
G1 Check By Rb And p53
S Phase
DNA Mismatch Repair
DNA Synthesis
G2 Phase
G2 Check
M Phase
Mitosis And Cytokinesis
3 mins
Prophase
Nuclear Membrane Disintegrates
Centrioles Migrate
Spindle Apparatus Forms
Meiosis I starts Diploid
Homologous Chromosomes form Tetrads
Tetrads Cross Over
Meiosis II starts Haploid
Mitosis starts Diploid
Sister Chromatid Pairs Stay Separated
2 mins
Metaphase
Characteristics
Microtubules Extend from Centrioles' Spindles
Centromere
Kinetochore
Meiosis I Tetrads Aligned at Metaphase Plate
Meiosis II Sister Chromatids Aligned at Metaphase Plate
Mitosis Sister Chromatids Aligned at Metaphase Plate
57 secs
Anaphase
Spindle Microtubules from Centrioles Split Pairs
Meiosis I Tetrad Splits into Two Sister Chromatid Pairs
Meiosis II Sister Chromatid Pair Splits into Two Chromatids
Mitosis Sister Chromatid Pair Splits into Two Chromatids
1 min
Telophase
Cytokinesis Divides Cells
Meiosis I Cell Ends Haploid
Meiosis II Cell Ends Haploid
Mitosis Cell Ends Diploid
Chromosomes Decondense into Chromatin
Nuclear Membrane Reforms
1 min
Meiosis I
Characteristics
Prophase I
Centrioles Migrate
Spindle Apparatus Forms
Nuclear Membrane Disintegrates
Metaphase I
Microtubules Extend from Centrioles Spindle
Spindle Fibers Attach to Centromere
Fused at Kinetochore
Randomly Align at Metaphase Plate
Anaphase I
Spindle Microtubules from Centrioles Split Pairs
Tetrad Splits into 2 Sister Chromatid Pairs
Telophase I
Cytokinesis Divides Cell
3 mins
Meiosis II
Prophase II
Centrioles Migrate
Spindle Apparatus Forms
Nuclear Membrane Disintegrates
Metaphase II
Sister Chromatids Align at Metaphase Plate
Anaphase II
Sister Chromatids Pulled Apart Into Two
Telophase II
Cytokinesis Divides Cells
4 Haploid Daughter Cells
2 mins
Epstein Barr Virus
Characteristics
Herpesvirus 4
Double Stranded DNA
Linear
Enveloped
Signs and Symptoms
Infectious Mononucleosis
Virus Attaches to CD21 in B Cells
Nasopharyngeal Carcinoma
Burkitt's Lymphoma
Hodgkin's Lymphoma
1 min
Lynch Syndrome (Hereditary Nonpolyposis Colorectal Cancer)
Characteristics
Autosomal Dominant
Defective DNA Mismatch Repair
80% Risk of Colon Cancer Development
Proximal (Right) Colon
Type II associated with Endometrial, Ovarian and Skin Cancers
3-2-1 Rule
3 Relatives with Colon Cancer
Occurs Across 2 Generations
1 Relative Diagnosed < 50 Years Old
Treatment
Frequent Screening
Colectomy
3 mins
Human Papillomavirus (HPV)
Characteristics
Non-enveloped
Circular
Double Stranded DNA
Disease
Warts 1, 2, 6, 11
Condyloma acuminata
Type 16, 18
Cervical Carcinoma
Penile Carcinoma
AIDS/Immunocompromised
Worsened by Smoking
Diagnosis
Koilocytic change in squamous epithelium
Pyknotic Nuclei Surrounded by Clear Halo
Treatment
Vaccine Available
4 mins
Ataxia Telangiectasia
Pathophysiology
Autosomal Recessive
ATM Gene
Defect in DNA repair
Signs & Symptoms
Cerebellar defects
Spider Angiomas
Sensitive to Radiation
Defective Tumor Suppressor Gene
Increased risk of Cancer, Leukemias, and Lymphomas
Increased AFP levels
IgA deficiency
Repeated sinopulmonary infections
2 mins
Fragile X
Pathophysiology
Trinucleotide Repeat
CGG Repeats
FMR1 Gene
X-linked Dominant
Signs and Symptoms
Developmental Delay
Autism
Large Ears
Large Jaw
Long Face
Macroorchidism
2 mins
Angelman's Syndrome
Mechanism
Paternal Imprinting
Deletion of Chromosome 15q (Maternal Deletion)
Signs And Symptoms
Happy Puppet Syndrome
Inappropriate Laughter
Ataxia
Severe Intellectual Disability (Mental Retardation)
Seizure
Abnormal EEG
2 mins
Huntington's Disease
Pathophysiology
Autosomal Dominant
Trinucleotide Repeat
CAG Repeats
Chromosome 4
Anticipation
Caudate
Decrease of ACh
Decrease of GABA
Signs and Symptoms
Chorea
Dementia
Depression
Glutamate Toxicity
Neuronal Death via NMDA Binding
3 mins
Burkitt's Lymphoma
Adolescents or young adults
C-myc gene moves next to heavy chain Ig gene
T 8;14
Starry sky appearance
Sheets of lymphocytes with interspersed macrophages
Jaw lesion in endemic (African) form
Pelvis or abdomen in non endemic form (American form)
Associated with EBV
2 mins
Rituximab
Indications
Chronic Lymphocytic Leukemia (CLL)
Non-Hodgkin Lymphoma
Rheumatoid Arthritis
Microscopic Polyangiitis (MPA)
Wegener's (Granulomatosis with Polyangiitis)
Mechanism
Monoclonal Antibody Against CD20
Found on B Cell Neoplasms
Side Effects
Infusion Reactions
Skin and Mouth Reactions
Reactivation of Hepatitis B Virus (HBV)
Progressive Multifocal Leukoencephalopathy (PML)
3 mins
Bevacizumab Mechanisms and Indications
Mechanisms
Monoclonal Antibody to VEGF
Inhibits Angiogenesis (and Vasculogenesis)
Indications
Capillaries Grow CORN (CG-CORN acronym)
Colorectal Cancer
Glioblastoma
Cervical Cancer
Ovarian Cancer
Renal Cell Carcinoma
Non-small Cell Lung Cancer (NSCLC)
Age-related Macular Degeneration
2 mins
Hypercholesterolemia Disease
Risk Factors
Diabetes
Smoking
Family History
Hypertension
HDL < 40
Men Older than 45 Years of Age
Women Older than 55 Years of Age
Signs and Symptoms
Atheromas
Plaques in Blood Vessel Walls
Tissue Ischemia
Xanthomas
Lipemia Retinalis
2 mins
Sickle Cell Anemia (Mechanism)
Intrinsic Normocytic Hemolytic Anemia
Point Mutation
Autosomal Recessive
African-American
Dehydration or Decreased O2
Newborns Asymptomatic
Heterozygote Malarial Resistance
2 mins

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