Genetics & Meiosis Flashcards
UNIT 3 TEST
Mono zygotic twins
-identical
-1 sperm, 1 egg
-100% shared DNA
-not as likely to run in families
-less common
dizygotic twins
-fraternal
-more common
-50% shared DNA
-2 sperm, 2 egg
-more likely to run in families
triplet formation
3 separate eggs are fertilized by 3 separate sperm
what is meiosis
process that produces gametes for the body
blood antigens
A:A
B:B
AB:A,B
O: none
blood antibodies
A:B
B:A
AB: none
O: A,B
most important stage of meiosis and why
prophase 1: tetrad formation and crossing over (genetics variation)
karyotype
arrangement of chromosomes
genotype
genetics makeup of an individual
phenotype
physical characteristics of an individual
pedigree
shows occurrence and appearance of a tracked trait
MSUD
body cannot break down certain amino acids
mitosis results in
2 diploid cells (identical)
meiosis results in
4 haploid cells (genetically different)
law of segregation
alleles separate so gamete only carries one copy of gene
