'23 chromosomes' presentation slideshows

CHAPTER 3 GENES, ENVIRONMENT, AND DEVELOPMENT

CHAPTER 3 GENES, ENVIRONMENT, AND DEVELOPMENT. Learning Objective. What do evolution and species heredity contribute to our understanding of universal patterns of development?. Species Heredity. Genetic endowment that members of a species have in common

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Where do babies come from?

Where do babies come from?. Where Babies Come From. Pre-Assessment. Put cards on the board and have students put them in order. Put students in groups to do this and then pick a group to see if they are right.

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HUMAN REPRODUCTION BIOLOGY 269

HUMAN REPRODUCTION BIOLOGY 269. Humans:. Reproduce sexually with internal fertilization The purpose of sex, of course, is to get an egg fertilized by a sperm, combining the chromosomes that each contains. This occurs a few hours after both: a. b.

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MEIOSIS Chapter 11-4

MEIOSIS Chapter 11-4. Warm Up Chapter11-4. What does diploid mean? What does haploid mean? How many chromosomes does mitosis produce in a cell? How many chromosomes does meiosis produce in a cell? What are homologous chromosomes?. Warm Up Chapter 10 and 11-4.

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Dominant vs. Recessive Alleles

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Exercise 13:Reproduction

Exercise 13:Reproduction. Meiosis Spermatogenesis Oogenesis Ovarian cycle Uterine cycle Fertilization Embryonic and fetal development. Meiosis.

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Human body cells have 46 chromosomes

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Biological Sequence Analysis

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Introduction to genetics - Part II

Introduction to genetics - Part II. Mrs. Stewart Honors Biology Central Magnet School. Bell work. Describe the relationship between genotype and phenotype. Standards. CLE 3210.4.1 Investigate how genetic information is encoded in nucleic acids.

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Nuclear DNA and Mitochondrial DNA

Nuclear DNA and Mitochondrial DNA. Purpose. Isolate, amplify, and sequence a piece of DNA from the mitochondria of your own cheek cells. Nuclear DNA. Present in almost every cell Combination from both parents; 23 chromosomes from each parent. Mitochondrial DNA.

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Fishing for Chromosomes

Fishing for Chromosomes. Ankur Shah. Chromosome Structure. 23 pairs of chromosomes (22 autosomes) p and q arms; centromere and telomere Normal karyotypes: 46,XX and 46,XY Prophase & metaphase chromosomes consist of 2 identical sister chromatids (held together by the centromere)

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Fertilization, Pregnancy and birth

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How Am I Related to my Mother?

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Genetic Variation

Genetic Variation. SBI3U @ RHSA. The Law of Independent Assortment. Alleles segregate independently when gametes are formed during meiosis. Every individual has two alleles for each gene. Each gamete contains only one allele for a given gene.

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Meiosis

Meiosis. What is it?. The process where gametes are formed 2 stages of cell division (some similarities to the phases in mitosis) The chromosome number of the daughter cell is half of the parent cell A gamete has n number of chromosomes (a hapliod number)

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Chapter 27 Human Genetics

Chapter 27 Human Genetics. 27.1 Role of Chromosomes 27.2 Human Traits 27. 3 Genetic Disorders. 27.1 Role of Chromosomes. Chromosome number How to tell the chromosome number Sex Determination. Human Chromosomes. Each sperm or egg has 23 chromosomes

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What are sex cells?

flexible tail for swimming. lots of mitochondria for providing energy. food source in cytoplasm for embryo. enzymes to digest egg cell membrane. protective outer cell layers. What are sex cells?.

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Sexual Reproduction in Cells (Meiosis!)

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The Cell & Inheritance

The Cell & Inheritance. Biology. The Cell & Inheritance. How are chromosomes involved in the inheritance of alleles?. Chromosomes & Inheritance. Observations 23 chromosomes in egg cell and 23 chromosomes in sperm cells

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What is Triploidy?

What is Triploidy?. Born with 69 chromosomes 3 of every chromosome 69, +1 thru 23, XXX. How Do You Get Triploidy?. Random 3 Ways 1) 2 sperm (each with 23 chromosomes) fertilize one egg (23 chromosomes) 2) Sperm with 46 chromosomes fertilizes egg with 23 chromosomes

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