Science revision

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Year 10, Term 2 -Exam Science Revision
Jo Hofler
Flashcards by Jo Hofler, updated more than 1 year ago
Jo Hofler
Created by Jo Hofler over 6 years ago
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Question Answer
what is DNA DISTINCTIVE CHARACTERISTICS OR QUALITIES OF SOMEONE OR SOMETHING, regarded as unchangeable
What is a Chromosome protein associated with DNA
What is a Gene A segment of DNA containing infromation
What is a Haploid One set of gametes, sex cells or chromosomes
What is a Diploid Two sets of chromosomes
How do chromosomes of a male differ to a women. Which determines the sex Chromosomes in a male are XY and in a female they're XX. males determine the sex
What is an Allele The two genes that occupy the same homologous chromosomes
Definition of Homozygous having identical alleles for a particular gene
Definition of Heterozygous Having two different alleles for a particular gene
Definition of Dominant The allele of a gene that masks or suppresses the expression of an alternative allele
Definition of Recessive An allele that is masked by a dominant allele
Definition of Phenotype The physical appearance of an organism
Definition of Genotype The genetic makeup of an organism
Definition of Centromere Point where sister chromatids are joined together
Definition of Complementary A pair of bases that can join to make part of the DNA ladder
Definition of Chromatid (sister) Identical structures that result from chromosome replication
What are the matching strands of DNA, atcg a - t c - g
Explain the steps of how DNA is copied to produce a new strand 1. The helix separates and bases are exposed 2. Nucleotides pair up with exposed bases 3. Sugar and phosphate bond with nucleotides
What is a gamete? Sperm and Egg calls
Asexual defenition is a type of reproduction where offspring arises from a single organism and inherits one pair of genes
Sexual Reproduction A type of reproduction in which the genetic materials from 2 different cells produce offspring
What is Embryology Similarities between different species. at early stages of development
What is a Selective Agent An environmental factor that acts on a population during natural selection
Variation Differences in individuals within the same population
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