A heterozygous individual has two different alleles. Therefore it would have the genotype Aa. An individual with the genotype Aa can make two types of gametes: A and a. Since this is a random process, the individual will, on average, make equal numbers of each gamete.
Can gametes be heterozygous?
Possible combinations of alleles in gametes of plants heterozygous for two traits. Since alleles of different traits segregate independently during gamete formation, there is the same probability that the Y (or y) allele will segregate with the S allele as with the s allele.
How many gametes can a homozygous produce?
Predicting the genotype of offspring
There are four possible combinations of gametes for the AaBb parent. Half of the gametes get a dominant A and a dominant B allele; the other half of the gametes get a recessive a and a recessive b allele. Both parents produce 25% each of AB, Ab, aB, and ab.
What does it mean if a gamete is heterozygous?
Matching genes occurring at the same loci on homologous chromosomes are called alleles. If a pair of alleles are identical they are called homozgous. If the pair contains two different alleles (one dominant and one recessive) they are termed heterozygous. [
How many gametes can an individual make?
But what about chromosome reassortment in humans? Humans have 23 pairs of chromosomes. That means that one person could produce 223 different gametes. In addition, when you calculate the possible combinations that emerge from the pairing of an egg and a sperm, the result is (223)2 possible combinations.
How many gametes can be formed from Aabbccdd?
One type by AABBCCDD & 16 type by individual Aa Bb Cc Dd 24 = 16.
How many chromosomes do gametes have?
In humans, gametes are haploid cells that contain 23 chromosomes, each of which a one of a chromosome pair that exists in diplod cells. The number of chromosomes in a single set is represented as n, which is also called the haploid number.
How many genotypes are possible with 4 alleles?
4 alleles there are 1 + 2 + 3 + 4 = 10 genotypes.
How many types of gametes are produced by the individual with genotype Aabbccdd and Aabbccdd?
One type by AABBCCDD & 16 type by individual Aa Bb Cc Dd (24 = 16).
What are homozygous and heterozygous alleles?
Homozygous: You inherit the same version of the gene from each parent, so you have two matching genes. Heterozygous: You inherit a different version of a gene from each parent.
Is BB homozygous or heterozygous?
An organism with two dominant alleles for a trait is said to have a homozygous dominant genotype. Using the eye color example, this genotype is written BB. 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.
How many gametes are involved in double fertilization?
Double fertilization is a complex fertilization mechanism of flowering plants (angiosperms). This process involves the joining of a female gametophyte (megagametophyte, also called the embryo sac) with two male gametes (sperm).
How many gametes are produced in meiosis?
Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. This process is required to produce egg and sperm cells for sexual reproduction.
What are the heterozygous genotypes?
(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).