Sets 4 Flashcards
Chromosomes
what is the chromosomal theory of inheritance?
hereditary info is on genes and genes are on chromosomes
what 6 animals are the exception of the 2 sex chromosomes ?
platypus, arachnids ,clowfish,crocodiles, alligators and turtles
what is the difference in XO between human & drosophila ?
within drosphilia its a sterile male in humans its a female with turner syndrome
what is OY in drosphilia and humans ?
death for both
what is the difference in XXX between humans vs drosphilia
in drosphilia its dies in humans its a normal female
what is the difference in XXY between humans vs drosphilia
in drosphilia its a normal female, in a human male with klinefelter syndrome
what is an XYY in drosphilia and humans
both male
how is drosphiia sex determined ?
ratio of x chromosomes to autsomes
what is a haploid ? what type of chromosomes is it?
its a single copy of each chromosomes ; its non homologous chromosomes both are differenr
what is a diploid? what type of chromosomes is it ?
it a double copy of each chromosomes ; it a homologous pair of chromosomes
what are 4 things about homologous chromosomes
- members of a chromosome pair
- same genes
- varies in alleles
- they pair at meiosis
what are non sister chromotids
same gene but has different alleles
what are sister chromotids
same gene same alleles
what are non homologous chromosomes?
has different genes and dont pair a meiosis
what is a karotype ?
a appearnace of the complete set of chromosomes , taken at metphase , somatic cells
what is XY in dros and humans
males
what is XX in dros and humans ?
females
