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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