Use your knowledge of genetics and pedigrees to complete this worksheet.
Seard
Sex-linked traits are those whose genes on the sex chromosomes and are found only on the X
chromosome, not on the Y chromosome.
Males: XY - have only 1 copy of the gene
Females: XX - have 2 copies of the gene.
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Females can be normal, show the trait, or be carriers. Males can either be normal or show the trait, but
cannot be carriers.
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Genetics
1. In squids, eye color is a sex linked trait. Red is dominant to black. XR represents
red eyes and X represents black eyes.
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A. What the sexes and phenotypes of squids with the following genotypes:
Microsoft
XRX
XRY
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English (US
XRXR
XY
B. What are the genotypes of these squids:
Red eyed, male
Red eyed female
Black eyed female
Black eyed male:
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Will mark brainliest i only need the ! 1.use ten beads and a centromere of one color to construct the long chromosome. use ten beads and a centromere of a second color to construct the second chromosome in the long pair. make a drawing of the chromosomes in the space below. 2. for the second pair of chromosomes, use only five beads. 3. now model the replication of the chromosomes. make a drawing of your model in the space below. part b: meiosis i during meiosis i, the cell divides into two diploid daughter cells. 4. pair up the chromosomes to form tetrads. use the longer tetrad to model crossing-over. make a drawing of the tetrads in the space below. 5. line up the tetrads across the center of your “cell.” then model what happens to the chromosomes during anaphase i. 6. divide the cell into two daughter cells. use the space below to make a drawing of the result. part c: meiosis ii during meiosis ii, the daughter cells divide again. 7. line up the chromosomes at the center of the first cell, one above the other. separate the chromatids in each chromosome and move them to opposite sides of the cell. 8. repeat step 7 for the second cell. 9. divide each cell into two daughter cells. use the space below to make a drawing of the four haploid cells