Download FACT SHEET GENES AND CHROMOSOMES [PDF]
Description: In their body cells, humans have 46 chromosomes, made up of 23 pairs. There are 44 chromosomes numbered 1-22 (called autosomes) according to size from the smallest to the largest and two sex chromosomes: X and Y Women’s chromosomes are described as 46,XX; men’s as 46,XY A mother passes 23 chromosomes to her child through her egg ..
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22 pairs (Chromosomes #1-22) Two Types of Chromosomes: 2. Sex Chromosomes: . A picture of the chromosomes in which the chromosomes arranged in matching (homologous) pairs . Karyotypes –Arranged in size order from largest pair to smallest pair –The sex chromosomes (X and Y) are usually
This "dropping your chromosomes" will determine which one of the pair of chromosomes will enter the successful germ cell. Each parent, mom and dad, donate one and only one of each of their 23 pairs of chromosomes. Therefore, they each donate 23 chromosomes. Since genes ride in the DNA of the chromosomes, each child will end up with a pair of
Biologists can analyze human chromosomes by looking at a karyotype. A karyotype is a picture of the chromosomes from a cell arranged in homologous pairs. Humans have 46 chromosomes. Two of these chromosomes, X and Y, are the sex chromosomes. Females have two X chromosomes (XX). Males have one X and one Y chromosome (XY). The other
Chromosomes As a cell prepares to divide, its chromatin fibers condense, becoming visible as the compact structures called chromosomes. Each chromosome may contain many hundreds of genes Chromosomes The number of chromosomes in a eukaryotic cell depends on the species.
Chromosomes Genes occur in chromatin of nucleus, which condense into CHROMOSOMES (colored bodies) visible only during MITOSIS : bacteria have about 3,000 genes & 1 chromosome (DNA molecule) humans have some 20 to 25,000 genes & 46 chromosomes Humans ha
Picture 2: 23 pairs of chromosomes arranged according to size; chromosome 1 is the largest. The last two chromosomes are sex chromosomes. The chromosomes (see Picture 2) numbered 1 to 22 look the same in males and females. These are called the autosomes. Pair number 23 is different in males and females and they are called the sex chromosomes.
DNA condenses into duplicated chromosomes Each chromosome contains two copies of the same DNA (the copies were made in interphase) Note about diagram: Red chromosomes from mom; blue chromosomes from dad Each pair of chromosomes with the same shape and length contains the same gene locations: they are a homologous pair of chromosomes.
DNA Genes to Proteins Kathleen Hill Lab Tour WSC 333. 2 The human genome is a multi-volume instruction manual The GENOME is a multi-volume instruction manual Each CHROMOSOME is a volume of text Genes are a chapter of text in the volume The text is written in a chemical language that has a four letter alphabet A,C,G,T NUCLEOTIDES Our instruction manual can be read in our DNA .