WebChromosomes were first named by cytologists viewing dividing cells through a microscope. The modern definition of a chromosome now includes the function of heredity and the … An allele is a variation of the same sequence of nucleotides at the same place on a long DNA molecule, as described in leading textbooks on genetics and evolution. The word "Allele" is a short form of "allelomorph". "The chromosomal or genomic location of a gene or any other genetic element is called a locus (plural: loci) and alternative DNA sequences at a locus are called alleles."

Chromosomes Fact Sheet - Genome.gov

WebDec 10, 2014 · If the genes have different alleles, can the chromosomes still be homologous? • ( 6 votes) mystick358 8 years ago Yes. An "allele" of a gene can be as simple as a single nucleotide difference, or an insertion or deletion of hundred of bases. WebWhat is an allele? Well, alleles are matching genes; one from our biological mother, one from our biological father. We have two copies of every gene (strings of code that drive … birchwood manor ambler pa

What Is the Relationship Between a Chromosome & an …

WebThe allele for haemophilia is recessive so two copies are needed for a female to have the disease. However, because males only have one X chromosome, they only need one … WebTextbook Question. Edward was found to be heterozygous (Ss) for sickle-cell trait. The alleles represented by the letters S and s are a. linked. b. on homologous chromosomes. c. both present in each of Edward’s sperm cells. d. on the same chromosome but far apart. WebThe set of alleles carried by an organism is known as its genotype. Genotype determines phenotype, an organism's observable features. When an organism has two copies of the same allele (say, ... Doesn't the crossover between the homologous chromosomes mix up … birchwood manor bellingham