What genes expressed when gene pairs are homozygous?
Dominant alleles for a trait are usually expressed if an individual is homozygous dominant or heterozygous.
Which of the following represents homozygous condition?
Hemizygous is a condition in which only one copy of a gene or DNA sequence is present in diploid cells. Males are hemizygous for most genes on sex chromosomes, having only one X and one Y chromosome.
Which gene is seen in the heterozygote?
…a hybrid plant, termed a heterozygote (Rr). Since the gene R, for purple, is dominant over r, for white, the F1 generation hybrids will show purple flowers. They are phenotypically purple, but their genotype contains both R and r genes, and these alternative (allelic or allelomorphic) genes do not blend…
What is a homozygous recessive gene?
Homozygous means that the organism has two copies of the same allele for a gene. An organism can be homozygous dominant, if it carries two copies of the same dominant allele, or homozygous recessive, if it carries two copies of the same recessive allele.
Are alleles genes?
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.
Which genotype show the heterozygous condition?
When a gene pair (allele) contains two different genes in an organism then the organism is considered as heterozygous for that particular character. In the given options ‘ Rr ‘ shows heterozygous condition.
Which genotype represents a heterozygous condition?
An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype. In our example, this genotype is written Bb.
Which of the following represents a homozygous genotype?
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. If that have Aa, they are heterozyous.