Genes can come in 2 different forms called alleles. We represent alleles with both lowercase and uppercase letters. … A dominant (uppercase letter) allele will overpower a recessive allele (lowercase letter). Our genotype is our genetic code.
What is it called when a genotype contains a capital and lowercase letter?
Heterozygous. An organism is heterozygous for a trait (characteristic), when the two alleles in pair are different. A heterozygous genotype would have one capital and one lowercase letter.
What is represented by upper and lowercase letters?
We represent alleles with both lowercase and uppercase letters. Uppercase and lowercase letters are used to show which alleles are dominant and which are recessive. A dominant (uppercase letter) allele will overpower a recessive allele (lowercase letter).
Is homozygous capital or lowercase?
A homozygous trait is referred to by two capital letters (XX) for a dominant trait, and two lowercase letters (xx) for a recessive trait.
Is genotype uppercase or lowercase?
When discussing genotype, biologists use uppercase letters to stand for dominant alleles and lowercase letters to stand for recessive alleles. With eye color, for instance, “B” stands for a brown allele and “b” stands for a blue allele.
What is the term heterozygous mean?
(HEH-teh-roh-ZY-gus JEE-noh-tipe) The presence of two different alleles at a particular gene locus. A heterozygous genotype may include one normal allele and one mutated allele or two different mutated alleles (compound heterozygote).
What represents homozygous genotypes?
A homozygous genotype means that you have two of the same alleles, which are represented by the letters A or a. So if an individual has AA or aa, we say they are homozygous.
Which of the following terms refers to a capital letter?
Capital letters are also called uppercase letters or simply capitals. … We also use a capital letter for the first letter of the first word in a sentence.
What type of letters are also known as lowercase letters?
In the printed alphabet and orthography, the term lowercase (sometimes spelled as two words) refers to small letters (a,b,c …) as distinguished from capital letters (A,B,C…). The terms is also known as minuscule (from Latin minusculus, “rather small”), and alternate spellings include “lower case” and “lower-case.”
What is meant by an allele?
An allele is one of two or more versions of a gene. An individual inherits two alleles for each gene, one from each parent. … Though the term allele was originally used to describe variation among genes, it now also refers to variation among non-coding DNA sequences.
What does the lowercase letter in a genotype represent?
genotype = the genes of an organism; for one specific trait we use two letters to represent the genotype. A capital letter represents the dominant form of a gene (allele), and a lowercase letter is the abbreviation for the recessive form of the gene (allele).
What is a genotype and phenotype?
The genotype refers to the genetic material passed between generations, and the phenotype is observable characteristics or traits of an organism.
Is heterozygous dominant capital or lowercase?
But if the gene is heterozygous, meaning it has two different alleles, the capital letter will be the trait one will see in the animal. The capital letter is said to be the dominant trait and the small letter is the recessive trait.
What are the 3 types of genotypes?
There are three types of genotypes: homozygous dominant, homozygous recessive, and hetrozygous.
Why does a genotype have two letters?
The two letters in a genotype represent the pair of alleles. The uppercase letter represents the dominant allele and the lowercase letter represents recessive allele.
Why are there always two letter choices capital and lowercase for each trait?
Many scientists use uppercase letters to represent a dominant allele and lowercase letters to represent a recessive allele. … She would represent her genotype as “BB” and her husband’s genotype as “gg” because having brown eyes is a dominant trait while having green eyes is a recessive trait.