Trace a DNA Sequence or a Meiosis Cell: HSC-Style Practice | Year 12 Biology

Full lesson, notes and practice questions: https://hscscience.com.au/subjects/bi... Full lesson, notes and practice questions: https://hscscience.com.au/subjects/bi... Full lesson, notes and practice questions: https://hscscience.com.au/subjects/bi... Full lesson, notes and practice questions: https://hscscience.com.au/subjects/bi... Practise tracing unfamiliar DNA, mRNA and meiosis questions. Follow a copying error through two rounds of replication, turn a coding strand written from its 3' end into mRNA and an amino acid chain, track chromosome number and DNA mass through meiosis in a koala cell, and list the four pollen cells made after one crossover in a sweet pea. Each question is worded as in an exam: pause, pick out the givens, try it, then work through it one step at a time. Questions are written for HSCScience in the HSC style; they are not official NESA questions. 0:00 How to trace an unfamiliar question 0:31 Question 1: A DNA copying error 2:21 Question 2: From DNA to amino acids 4:07 Question 3: Chromosomes through meiosis 5:59 Question 4: One crossover, four cells 7:54 Choose your tracing method 8:22 Key notes Biology 2017: Year 12 Module 5, Heredity. Practice for modelling DNA replication, meiosis and polypeptide synthesis. Syllabus dotpoints (NSW Biology Stage 6, 2017, Module 5): "model the processes involved in cell replication, including but not limited to: mitosis and meiosis (ACSBL075) DNA replication using the Watson and Crick DNA model, including nucleotide composition, pairing and bonding (ACSBL076, ACSBL077)" "model the process of polypeptide synthesis, including: (ACSBL079) transcription and translation assessing the importance of mRNA and tRNA in transcription and translation (ACSBL079) analysing the function and importance of polypeptide synthesis (ACSBL080) assessing how genes and environment affect phenotypic expression (ACSBL081)" "model the formation of new combinations of genotypes produced during meiosis, including but not limited to: interpreting examples of autosomal, sex-linkage, co-dominance, incomplete dominance and multiple alleles (ACSBL085) constructing and interpreting information and data from pedigrees and Punnett squares" "conduct practical investigations to predict variations in the genotype of offspring by modelling meiosis, including the crossing over of homologous chromosomes, fertilisation and mutations (ACSBL084)" Official 2017 course: https://www.nsw.gov.au/education-and-... Prerequisite: DNA copying, mitosis, meiosis, transcription and translation. Next: How a chain of amino acids becomes a trait, and how genes and the environment shape it. #Year12Biology #Meiosis #HSCScience