DNA
What does DNA stand for?
Deoxyribonucleic Acid
What are chromosomes?
Tightly wound pieces of DNA
What is gamete cell division known as?
Meiosis
A trait that only requires one allele to be expressed
Dominant
True or False: Mr Peacock once had a rats tail
True, Grade 5 (I will never be forgiven for my sins)
What are the three components that make up a nucleotide?
Sugar, phosphate, nitrogenous base
What protein does DNA coil around?
Histones
What key event occurs in anaphase?
Chromosomes get pulled apart by spindle fibres
What is the difference between a gene and allele?
True (clearly)
Why is DNA considered a double helix?
Consists of two strands, twisted (a helix)
How are karyotypes organised?
By the size of the chromosome
What are the purposes of mitosis?
Growth, repair, and asexual reproduction
If a male has the disease and the disease is x linked recessive, what must be his genotype?
Xlowercase Y
What is Mr Peacock's favourite anime?
Fullmetal Alchemist Brotherhood
What is the name of the strand of DNA that mirrors the other in terms of base pairs?
The complementary strand
If a diploid cell has 28 chromosomes, how many would a haploid cell have?
14
When and what happens when homologous chromosomes line up in meiosis?
Prophase 1, crossing over occurs
If a person is affected, but neither of their parents are, what must be the genotype of the parents? Assume autosomal inheritance
Both heterozygous
How long has Mr Peacock been dating his partner?
3 years
What type of bonding occurs between base pairs?
Hydrogen bonds
What is a sister chromatid?
Identical copy of a chromosome, only exists during cell division
How many chromatids exist in a cell after DNA replication occurs?
92
Why is Y linked neither recessive nor dominant?
Only ever one copy of an allele so they will never compete to be expressed
What highschool did Mr Peacock go to as a youth?
Sandringham College