If the genotype is “Aa, Bb”, then 4 different kinds of gametes can be made: (aB, AB, ab, and Ab) A creature with 2 heterozygous genes is called a “dihybrid.” A “tri-hybrid”, a beast with 3 hybrid genes, would produce 8 different kinds of sperm/egg.
What is double recessive parent?
a GENOTYPE in which both ALLELES of a gene are of the recessive type, i.e. HOMOZYGOUS.
What does double recessive mean?
double recessive An organism with two recessive alleles for a particular characteristic.
How many different kinds of gametes will be formed by an individual who is heterozygous for four gene pairs?
Hints For Biology 101 Exam #4
|No. of homologous chromosome pairs (heterozygous genes)||No. of different gametes from each parent|
|1 (Aa X Aa)||2 (21)|
|2 (AaBb X AaBb)||4 (22)|
|3 (AaBbCc X AaBbCc)||8 (23)|
|4 (AaBbCcDd X AaBbCcDd)||16 (24)|
How many different types of gametes would be produced by an organism of genotype AaBbCcDdEe if all of the genes assort independently?
The number of different possible gametes produced by the diploid genotype (AaBbCcDdEe) is 2 x 2 x 2 x 2 x 2 = 32 (2 for each pair of heterozygous genes).
What is an autosomal recessive gene?
To have an autosomal recessive disorder, you inherit two mutated genes, one from each parent. These disorders are usually passed on by two carriers. Their health is rarely affected, but they have one mutated gene (recessive gene) and one normal gene (dominant gene) for the condition.
What is an autosomal?
“Autosomal” means that the gene in question is located on one of the numbered, or non-sex, chromosomes. “Dominant” means that a single copy of the disease-associated mutation is enough to cause the disease. This is in contrast to a recessive disorder, where two copies of the mutation are needed to cause the disease.
What is homozygous double recessive?
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. Finally, the genotype of an organism with two recessive alleles is called homozygous recessive. In the eye color example, this genotype is written bb.
What are examples of recessive genes?
Examples of Recessive Traits
- Attached earlobes.
- Inability to roll tongue.
- Five fingers.
- Type O Blood.
- Hitch-hiker’s thumb.
- Blue eyes.
- Albinism: an albino lacks pigment or coloration in the skin.
- Sickle cell anemia: abnormal red blood cells make it difficult to transport oxygen throughout the body.
What are alleles quizlet?
An allele is an alternative form of a gene (one member of a pair) that is located at a specific position on a specific chromosome. These DNA codings determine distinct traits that can be passed on from parents to offspring.
What are the 4 types of gametes formed by the influence of Dihybridcross?
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.
How many gametes can be formed from Aabbccdd?
One type by AABBCCDD & 16 type by individual Aa Bb Cc Dd 24 = 16.
How many different types of gametes can be formed?
Therefore, the correct answer is ‘Four’.
How many gametes does Trihybrid produce?
The F1 hybrid produces 8 types of gametes.
How many types of gametes can be produced by a diploid organism?
Types of gametes =2n where n is number of heterozygous loci. Thus, gametes produced by a diploid organism could be 24=16.
Thus, totally four types of gametes will be produced.