BIOL10005 Lecture Notes - Lecture 6: Turner Syndrome, Sister Chromatids, Allosome

19 views3 pages

Document Summary

Androgen insensitivity locus on x chromosome (male that has the genotype xar y appear as female) -> outwardly female but no female sex organs and have undescended testes: haplo/diploidy (3-5) -> sex determined at conception. Female bees (workers and queen) are diploid and males (drones) are haploid: balance of autosomes to sex chromosomes. Sex is determined by the ratio of x chromosomes : sets of autosomes. Normal males have more sets of autosomes, 1:2: sex chromosome. Non disjunction in both anaphase 1 and 2. In anaphase 1, homologous pair stays in tact. In anaphase 2, sister chromatids do not separate (4x chromatids in one cell) Dna replication occurs but no cytoplasmic division takes place. One x chromatid from the male comes and fertilizes the cell -> 5x chromosomes in one cell. Around 80% of turner syndrome rises from the loss of sex chromosome from a sperm. Femaleness is the result of missing y chromosome.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents

Related Questions