(25 points) Name: BIOL 303: Fundamental Genetics 1) Use the images below to answ
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(25 points) Name: BIOL 303: Fundamental Genetics 1) Use the images below to answer the following questions. (0.5 pts each, 3 pts total) Homework #1 Due: Thursday, February 1 1.1 What is the diploid number of chromosomes for these karyotypes? K BR 81.2. What is the haploid number of schromosomes for these karyotypes? 1.3 What physical and molecular aspects allow homologous chromosomes to be 10 X X identified? Name 3 1.4 The karyotypes are from the same species. How are the two karyotypes different? 10 12 XY 2) From which phase of mitosis are karyotypes usually generated? (0.5 pts) 3) Draw the cell cycle indicating each phase and what occurs during each phase. (2 pts)Explanation / Answer
1.1 the diploid cells have 2 and number of chromosomes means is chromosome have two copies that is why this is called as deploid.
Here 13 pairs of chromosomes are present means 26 chromosomes
Diploi cell have 26 chromosomes or 13 pairs of chrmosomes.
1.1 haploid cell only have single copy of each chromosomes means only 13 chromosomes ( no pair available of any chromosome).
Diploid cell = 13 chrmosomes.
1.3 homologous chromosomes are chromosomes which occurs in pairs for example chromosome number 3 have two copies so these two copies are called as homeo logos chromosomes for each other.
physical: physical parameters like size, position of centromere, length of long arm and short arm, banding pattern which is analysed by staining or chromosome banding techniques.
Molecular : molecular parameters like sequence of DNA, number of genes, type of genes is same in homologous chromosomes ( But every gene have two copies one on each chromosome but these copies are slightly different known as allele).
1.4 Here karyotype A is different from Karyotype B because it is of female and male respectively.
XX = present in female
XY = present in males.
2). stereotype usually generated in the metaphasic stage of mitosis or sometimes prometaphasic stage of Mitosis.
As the time permitted I give all all answers according to chegg guidelines.
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