A normal wild strain of Triticum aestivum has 5 chromosomes (2n = 10). Trisomic plants are designated as
2n+1 is called trisomic,
1. one-sixth of the gametes would be of Tr2. so wild tyoe : 5:1 (5/6)th
2. 1:5 (1/6)th will be of wild type
3. (1/6)th will be of wild type
A normal wild strain of Triticum aestivum has 5 chromosomes (2n = 10). Trisomic plants are...
Aegilops cylindrica (2n=28) and Triticum vulgare (2n=42) are crossed. The resulting F1 plants from this cross had 35 chromosomes. Examination of metaphase I in the F1 plants revealed the presence of 7 pairs of chromosomes (bivalents) and 21 unpaired chromosomes (univalents). a. If the unpaired chromosomes segregate randomly, what possible chromosome numbers will appear in the gametes of the F1 plants? b. What does the appearance of the bivalents in the F1 hybrids suggest about the origin of Triticum vulgare...
Species I has 2n = 8 chromosomes and species II has 2n = 14 chromosomes. What would the expected chromosome numbers be in individuals with the following chromosome mutations? Give all possible answers. Allotriploidy including species I and II Autotetraploidy in species II Trisomy in species I Monosomy in species Allotetraploidy including species I and II
Question 11 4 points Save Answ The species Critrole mytinin has 2N = 10 chromosomes and Critrole mercer has 2N 36 chromosomes. Other species in the genus Citroe are thought to have arisen through polyploidy involving one or both of these species A third species, Cntro caduceus, has 72 chromosomes and therefore resulted from what type of polyploidy? Autotetraplody Allotriploidy Autotriploidy Allotetraploidy
Tom has 46 chromosomes and Tracy has only 45 chromosomes, both are phenotypically wild-type. Their first boy Lucas has only 45 chromosomes and has a wild type phenotype, whereas their second son Evan has 46 chromosomes and he has Down syndrome. 1. Draw chromosomes 15 and 21 for each of the family members and explain their genotypes and phenotypes 2. Tracy is 24 years old and pregnant again. Should she be concerned about having another child with Down syndrome. Explain...
A male Drosophila from a wild-type stock is discovered to have only seven chromosomes, whereas normally 2n = 8. Close examination reveals that one member of chromosome IV (the smallest chromosome) is attached to (translocated to) the distal end of chromosome II and is missing its centromere, thus accounting for the reduction in chromosome number. If this male mates with a female with a normal chromosome composition who is homozygous for the recessive chromosome IV mutation eyeless (ey), what chromosome...
The wild mockingjay is diploid and has twelve unique chromosomes. However, the domesticated mockingjay has nine copies of its twelve unique chromosomes. What is the correct scientific notation for the domesticated mockingjay? 2,12 9,12 12,9 12,108 9,108
A cross was made between two strains of plants that are agriculturally important. One strain was disease-resistant but herbicide-sensitive; the other strain was disease-sensitive but herbicide- resistant. A plant breeder crossed the two plants and then allowed the F1 generation to self-fertilize. The following data were obtained: F1 generation: All offspring were disease sensitive and herbicide resistant. F2 generation: 170 disease sensitive, herbicide resistant 60 disease sensitive, herbicide sensitive 44 disease resistant, herbicide resistant 10 disease resistant, herbicide sensitive Formulate...
QUESTION 5 You cross want to create a new hybrid plant. You cross Plant 1 (2n=10) with Plant 2 (2n=14) and generate a generation of hybrid plants. Most of the hybrid plants are infertile, however, you do find a hybrid plant that is fertile. You reason that this plant must have undergone a non-disjunction event that now rendered it fertile. If your reasoning is correct, how many chromosomes does this fertile hybrid plant have? O a. 24 Ob. 12 O...
1) An organism has 2n = 6 chromosomes with alleles A B / a b on the chromosome 1 homologous pair, alleles D / d on the chromosome 2 homologous pair, alleles E F / e f on the chromosome 3 homologous pair. Show two different ways that chromosomes could align at the metaphase plate during Meiosis I (show the chromosomes and alleles). Assume no crossing over. How many combinations of chromosomes are possible in the gametes? Please show me...
What are the different kinds of chromosomal duplication, and how do they differ from each other? What human disorder results from deletion of a region on chromosome 5 producing newborns that cry like a cat? If Dr. Obama wishes to reveal regions of the chromosomes that are rich in A-T base pairs in a karyotype preparation, she should use ___ to stain G bands on the chromosomes. A typical human karyotype has a total of ___ chromosomes and includes ___...