1. Genetics 1

2. 2 DNA replication occurs at mitosis or Meiosis? In replication , the original strand disappears- true / false Genetic code is made up of – chromosomes or base triplets The allele for a character that always appears in phenotypes is called- dominant / recessive 5. The recessive allele is always written in capital / small letters

3. 3 11 Sci write the answers only to the following questions Name the scientist who gave the double helix model of DNA DNA stands for _____________________________ acid How many bases make the DNA? Who controls the functions of the cell? What is genotype? What is phenotype?

4. 4 Write the answers to the questions below only Who is called the father of genetics? A person with black hair has genes Bb. What is his genotype and phenotype. What is monohybrid cross? The characters which will be in the baby are decided at meiosis or fertilisation? Two alternate forms of genes is called chromosome or allels? There are 23 pairs of chromosomes in zygote or a gamete?

5. 5 Which cell division is for growth? Which cell division is for reproduction? What are the same looking chromosomes called? What is a gamete and how many chromosomes does this contain? What is zygote how many chromosomes does this contain? Which cell division involves replication?

6. Genetics terms you should know 6 Genetics Trait Variation and its types genotype Asexual and Sexual reproduction phenotype Gametes replication Zygote allele Fertilisation Dominant , recessive Embryo alleles Mitosis monohybrid cross Meiosis Pedigree chart Cloning punnet square Chromosome homozygous Homologous chromosomes heterozygous DNA cloning Double helix structure selective breeding Genetic code pollination

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8. Genetics: Branch of science that studies how genes are inherited and expressed in plants ,animals and human beings 8

9. Variation The genetic variations observed in a species and population. Two types: 9

10. 1)Acquired Variations The variations due to environmental Factors or personal actions .e.g. Hair dyeing, long nails, cosmetic surgery 10

11. 2) Inherited Variation: The differences that are determined by what we received from our parents at the time of conception. Two types: 11

12. 1) Continuous Variation When a difference shows range in population .e.g. Hair colour can be black, brown, light brown and blonde. 2) Discrete Variation: When a difference shows a simple or discrete occurance.e.g. Ear lobes are fused or not fused. Rolling or not rolling tongue. 12