‘Scientists in the US have published the results of their detailed scrutiny of the genetic sequence of the human Y chromosome. This DNA bundle - one of 24 distinct chromosomes found in human cells - holds the crucial information to make the male of our species.
http://www.thehumangenome.co.uk/THE_HUMAN_GENOME/Y_Chromosome.html
Its pair, the chromosome with which it has some affinity of sequence, is not, as in every other case, an identical chromosome, but is the Y chromosome, a tiny and almost inert stub of a genetic afterthought…
http://www.thehumangenome.co.uk/THE_HUMAN_GENOME/Y_Chromosome.html
Genes are segments of chromosomes, which are made up of DNA. That's the approximate number of genes in the human genome. Our genes provide cells with information on how to make proteins. Scientists have estimated that humans may produce up to 100,000 proteins, so they thought there were about as many human genes.
https://publications.nigms.nih.gov/insidelifescience/genetics-numbers.html
After telophase I of meiosis, the chromosomal makeup of each daughter cell is. A. diploid, and the chromosomes are each composed of two chromatids. B. haploid, and the chromosomes are each composed of two chromatids. C. tetraploid, and the chromosomes are each composed of two chromatids.
https://quizlet.com/17620467/mel-bio-13-flash-cards/
Y Chromosome ‘With about 60 million building blocks, the Y chromosome is the smallest of the 46 chromosomes in the human body.’ BBC News online ‘Most mutations occur in males. It's about a two-fold difference. One suggested reason is the larger number of cell divisions in the male germ line (sperm).’ Wellcome Trust
http://www.thehumangenome.co.uk/THE_HUMAN_GENOME/Y_Chromosome.html
‘With about 60 million building blocks, the Y chromosome is the smallest of the 46 chromosomes in the human body.’ BBC News online. ‘Most mutations occur in males. It's about a two-fold difference. One suggested reason is the larger number of cell divisions in the male germ line (sperm).’ Wellcome Trust.
http://www.thehumangenome.co.uk/THE_HUMAN_GENOME/Y_Chromosome.html
Independent assortment of chromosomes is a result of. A. the random and independent way in which each pair of homologous chromosomes lines up at the metaphase plate during meiosis I. B. the random nature of the fertilization of ova by sperm. C. the relatively small degree of homology shared by the X and Y chromosomes.
https://quizlet.com/17620467/mel-bio-13-flash-cards/
That's the number of chromosomes in the nuclei of a person with Down syndrome and certain other genetic conditions. Most human cells have 46 chromosomes, but occasionally, a glitch in cell division results in a cell with too few or too many chromosomes. When this happens in egg or sperm cells, the child can have an abnormal number of chromosomes. People with Down syndrome have an extra copy of chromosome 21, one of the smallest chromosomes in the genome. 1953 DNA is shaped like a spiral staircase that can be split, copied and passed on to future generations.
https://publications.nigms.nih.gov/insidelifescience/genetics-numbers.html
With about 60 million building blocks, the Y chromosome is the smallest of the 46 chromosomes in the human body. As well has helping researchers investigate the genetic basis of male infertility, the data on the Y will be useful in tracing the roots of male ancestry.
http://www.thehumangenome.co.uk/THE_HUMAN_GENOME/Y_Chromosome.html
Compaction of the duplicated chromosomes during cell division (mitosis or meiosis) results either in a four-arm structure (pictured to the right) if the centromere is located in the middle of the chromosome or a two-arm structure if the centromere is located near one of the ends.
https://en.wikipedia.org/wiki/Chromosomes
what is the smallest chromosome in human cells
The Y chromosome is the smallest of the 46 chromosomes in the human body.