Unit 6 Cytogenetics and Molecular Genetics Flashcards
Who was the first scientist to observe chromosomes during mitosis?
Walther Flemming
What is the Chromosome theory?
It estates that hereditary factors (genes) are carried on chromosomes
What evidence supports the chromosome Theory?(3)
1) Gametes contain chromosomes which pass onto offspring
2) We literally saw the chromosomes in the nuclei
3) Mendel’s “Segregation”
What are Drosophila?
Fruit Fly
Why are Drosophila a good choice for the study of heredity? (5)
1) Reproduce quickly & short life spans
2) Don’t carry human diseases
3) You can breed 100 at once
4) Easy to keep and breed
5) Only 4 pairs of chromosomes (includes x and y)
What are the chromosomes that determine the sex of an individual?
Sex chromosomes
What are the other chromosomes called?
Autosomes
What are examples of human traits that are sex linked?
1) Duchennes muscular dystrophy
2) Color blindness
3) Hemophilia
Which sex is more likely to exhibit a sex linked trait?
Male
What is a Karyotype?
A picture of the chromosomes in a cell from an organism
What are some examples of tissues used form chromosomes analysis?
1) Amniotic Fluid
2) White blood cells
3) Skin
4) Bone marrow
What do 2 x’s and 1 y indicate?
Klinefelters Syndrome
What does having just 1 x indicate?
Turner Syndrome
What does 1x and 2 y’s indicate?
Super Male
What does 3 21’s indicate?
Down Syndrome
