IB DP Biology: SL复习笔记3.1.9 Karyograms
Karyograms During the stages of mitosis,?chromosomes condense?(become visible) This is most notable in?metaphase Staining?can reveal distinctive banding patterns on chromosomes at this stage The?po...
IB DP Biology: SL复习笔记3.1.8 Sex Determination
Sex Determination Sex is determined by an?entire chromosome pair?(as opposed to most other characteristics that are just determined by one or a number of genes) Females?have the sex chromosomes (pa...
IB DP Biology: SL复习笔记3.1.7 Chromosome Number
Haploid Haploid nuclei have one chromosome of each pair Haploid cells contain?one complete set of chromosomes (n) In other words, they have?half?the number of chromosomes compared to normal body ce...
IB DP Biology: SL复习笔记3.1.6 Eukaryotic Chromosomes
Eukaryotic Chromosomes Chromosomes in eukaryotic cells are?one,?very long?DNA molecule associated with proteins The main proteins present are the large, positively charged globular proteins called?...
IB DP Biology: SL复习笔记3.1.5 Prokaryotic Chromosomes
Prokaryotic Chromosomes The DNA in prokaryotic cells is significantly different from the DNA found in eukaryotic cells Prokaryotes?do not contain a nucleus?therefore the DNA is located in the cytop...
IB DP Biology: SL复习笔记3.1.4 Genome
Genome The?total of all the genetic information in an organism?is called the?genome?of the organism This is a?complete set of genes?present within every cell of an organism This includes?all genes?...
IB DP Biology: SL复习笔记3.1.3 Mutation
Mutation A?gene mutation?is a change in the sequence of base pairs in a DNA molecule; this may result in a new allele Mutations occur?all the time?and?at random There are certain points in the cell...
IB DP Biology: SL复习笔记3.1.2 Alleles
Alleles A gene codes for a specific polypeptide that can affect a specific trait or characteristic in an organism Eg. blood type Alternative forms of a gene?can exist, these various specific forms ...
IB DP Biology: SL复习笔记3.1.1 Genes
Genes & Polypeptides A gene is a section or?length of DNA?that codes for a?polypeptide Genes are?heritable factors?that influence specific?characteristics?(via the polypeptides produced) Charac...
