What does the genotype for a trait BB represent?

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.

Is BB heterozygous or homozygous?

A bull with two alleles for a black coat is homozygous (BB). A calf that has one allele for red coat color and one allele for black coat color is heterozygous (Bb). Heterozygous individuals contain two different alleles which results in conflicting instructions.

What is a genotype trait?

Simple. Genotype is the collection of genes responsible for the various genetic traits of a given organism. … The combination of the two, and which one is dominant, determines what trait the allele will express. Genotype simply means what alleles are carried in a particular organism’s DNA.

What are the 3 types of genotypes?

There are three types of genotypes: homozygous dominant, homozygous recessive, and hetrozygous.

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What are the chances (%) of an offspring having a BB genotype?

In the cross shown in Figure above, you can see that one out of four offspring (25 percent) has the genotype BB, one out of four (25 percent) has the genotype bb, and two out of four (50 percent) have the genotype Bb.

Are BB and BB the same genotype?

Genotypes with two alleles that are the same, i.e. ‘BB’ and ‘bb’, are known as homozygous genotypes and genotypes with two different alleles are known as heterozygous genotypes. …

Why are BB and BB considered homozygous combinations?

The first is homozygous, which means two copies of the same allele, like BB for two dominant alleles or bb for two recessive alleles. The other possible combination is heterozygous, which means one of each type of allele, like Bb for one dominant and one recessive allele.

Is BB dominant or recessive?

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.

What is genotyping used for?

Genotyping determines differences in genetic complement by comparing a DNA sequence to that of another sample or a reference sequence. It identifies small variations in genetic sequence within populations, such as single-nucleotide polymorphisms (SNPs).

Is AA a genotype?

What is a Genotype? … There are four hemoglobin genotypes (hemoglobin pairs/formations) in humans: AA, AS, SS and AC (uncommon). SS and AC are the abnormal genotypes or the sickle cells. We all have a specific pair of these hemoglobin in our blood which we inherited from both parents.

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What are 5 examples of genotypes?

Examples of Genotype:

  • Height. For an individual’s gene makeup there is tall variety (T) and there is short variety (s). T and s are called the alleles. …
  • Freckles or no freckles. Again the information that is passed from parent to child is carried in the cell of the genotype. …
  • Lactose intolerance.

What does BB mean in Punnett Square?

BB is called homozygous dominant. Both genes are the same and dominant. The dominant trait is expressed. Bb is called heterozygous. The organism has a dominant gene and a recessive gene.

Can a parent with a genotype of BB pass on a dominant allele to their offspring?

Parents and Offspring

Two parents each have a pair of alleles. Each parent contributes one of these alleles. … If a mother and father are both brown eyed with heterozygous genotype Bb, then they each have probability of 50% of passing on the dominant allele B and a probability of 50% of passing on the recessive allele b.

What is the probability or chance a child from a dad with genotype BB and a mom with genotype BB will have brown eyes?

There is a 50% chance that their children would be brown-eyed and have Bb or BB genotype.