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Chromosomes - TJ
Chromosomes - TJ

... DNA is not so neatly organized as you saw in Figure 1. The chromosomes in a cell are not naturally found lined up next to one another. Scientists take a picture of chromosomes and then match them up by size, except the last two. The finished picture is called a karyotype, as you see in Figure 2. Chr ...
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... 10. Diploid (2n): Two sets of homologous chromosomes. The number of chromosomes found in a body (somatic) cell. 11. DNA: deoxyribonucleic acid, the genetic material of cells that carries their genetic code. 12. Dominant (AKA complete dominance): In the heterozygote, the allele that determines the ph ...
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... • Cells become haploid via meiosis. • Meiosis: Process where a diploid cell with two pairs of each chromosome gives rise to haploid sex cells (gametes) with only one of each chromosome. 4. Homologous Pairs • Homologous Chromosomes (homologues): Pair of chromosomes with the same sequence of genes (on ...
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tay-sachs disease - Tay

... dominant mean? - If a disease is autosomal dominant, it means you only need to get the gene from one parent in order for you to inherit the disease. - An autosomal recessive disorder means two copies of the gene must be shown in order for you to inherit the disease or trait. - Sex-linked means that ...
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... testicular disorder of sex development occurs. This means that a fetus with two X chromosomes, one of which carrying the SRY gene, will develop as a male despite not having a Y chromosome. Deletions of genetic material in regions of the Y chromosome called azoospermia factor (AZF) usually cause Y ch ...
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UNIT 3 - OCCC.edu

... The two chromosomes in each pair are called ____________________________ chromosomes, or __________________________ Chromosomes in a homologous pair are the same ________________ and __________________ and carry __________________ controlling the same inherited characters The __________ chromosomes, ...
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Our Baby ! Names - Boone County Schools

... 1a. What is one phenotypic trait that is the same in Mom, Dad and baby dragon? 1b. Draw a Punnett square to show how your baby dragon inherited the genes that resulted in this trait. In the Punnett square, circle the genotype of your baby dragon. 1c. Suppose that Mom and Dad had a second baby. Would ...
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Y chromosome



The Y chromosome is one of two sex chromosomes (allosomes) in mammals, including humans, and many other animals. The other is the X chromosome. Y is the sex-determining chromosome in many species, since it is the presence or absence of Y that determines the male or female sex of offspring produced in sexual reproduction. In mammals, the Y chromosome contains the gene SRY, which triggers testis development. The DNA in the human Y chromosome is composed of about 59 million base pairs. The Y chromosome is passed only from father to son. With a 30% difference between humans and chimpanzees, the Y chromosome is one of the fastest evolving parts of the human genome. To date, over 200 Y-linked genes have been identified. All Y-linked genes are expressed and (apart from duplicated genes) hemizygous (present on only one chromosome) except in the cases of aneuploidy such as XYY syndrome or XXYY syndrome. (See Y linkage.)
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