What do we call chromosomes that are the same size and have the same genes?
The two chromosomes in a homologous pair are very similar to one another and have the same size and shape. Most importantly, they carry the same type of genetic information: that is, they have the same genes in the same locations.
What chromosomes are the same size?
The structure of X and Y chromosomes
While the chromosomes for other parts of the body are the same size and shape — forming an identical pairing — the X and Y chromosomes have different structures. The X chromosome is significantly longer than the Y chromosome and contains hundreds more genes.
What chromosomes occur in pairs of the same size and contain the same genes in both genders?
Twenty-two of these pairs, called autosomes, look the same in both males and females. The 23rd pair, the sex chromosomes, differ between males and females. Females have two copies of the X chromosome, while males have one X and one Y chromosome. The 22 autosomes are numbered by size.
Can you tell which of these column A and B represent the chromosome and which represent the gene How did you decide?
As you know by chromosomal theory of inheritance, genes are located on the chromosome and it is the Chromosome that segregates and assort independently during meiosis. So, the column A represents chromosomes and B represents gene.
How do you call the pairs of genes that carry the same traits?
homozygote. homozygote, an organism with identical pairs of genes (or alleles) for a specific trait. If both of the two gametes (sex cells) that fuse during fertilization carry the same form of the gene for a specific trait, the organism is said to be homozygous for that trait.
What are different forms of a gene called?
An allele is a variant form of a gene. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosome. Humans are called diploid organisms because they have two alleles at each genetic locus, with one allele inherited from each parent.
What chromosomes occur in pairs of the same size and contain the same genes in both genders quizlet?
Therefore, both males and females normally have 23 pairs of chromosomes. Of these 23 pairs, 22 of these, called autosomes, are the same in both males and females. The remaining pair are called the sex chromosomes, because they contain the genes that determine gender.
What are autosomes and Allosomes?
Autosomes are homologous chromosomes i.e. chromosomes which contain the same genes (regions of DNA) in the same order along their chromosomal arms. The chromosomes of the 23rd pair are called allosomes consisting of two X chromosomes in most females, and an X chromosome and a Y chromosome in most males.