All categories

3 years ago

2.Which of the following represents a genetic cross between 2 individuals that are each heterozygous for both traits?

Biology

1 answer:

wariber [46]3 years ago

7 0

Answer:

A. AaBb x AaBb

Explanation:

The term heterozygous refers to the presence of two different alleles of same gene in an organism. The one allele can be of wild type (original type) and one can be mutated or newly formed.

In the question, two traits are represented by two letters, A and B and alleles as A and a and B and b, respectively. We are asked about a cross involving two traits and two individuals in such a way that both are heterozygous.

If we look at option A, AaBb x AaBb,

we see that one trait A and the other trait B is in heterozygous form (Aa and Bb) in both individuals.

If we look at option B. AABB x AABB

we see that one trait A and the other trait B is in homozygous form form (AA and BB) in both individuals. Homozygous means when the alleles are same for each trait in an individual.

If we look at option C,Aa x Bb

There are not two traits, one trait of one individual and other trait of other individual is being crossed that is not possible.

If we look at option D. AAaa x BBbb

Again, the individuals are homozygous for two traits.

Therefore, A is best option.

Hope it helps!

You might be interested in

How does the Doppler effect change the appearance of emitted light?

Viefleur [7K]

The doppler effect changes the wavelength of the light emitted, depending upon whether source is moving away or coming towards the detector.

6 0

3 years ago

Hello, people of planet earth, I need help with a question for my friend Steve in science class, here on planet Neptune it is pr

ICE Princess25 [194]

The paramecium has two nuclei, a big and small one. The big one operates as the director of the cell's activities, rather like a little brain. The smaller one is used for reproduction. The paramecium splits in half (fission) just as the ameba does. First the smaller nucleus splits in half and each half goes to either end of the paramecium. Then the bigger nucleus splits and the whole paramecium splits. Occasionally two paramecium exchange material and form a new paramecium. This is called conjugation.

Conjugation in Paramecia occurs in the following way: 

a). The formation of ciliary contacts. 
b). Local loss of cilia and formation of narrow contacts between anterioventral somatic cell membranes 
c). Formation of small cytoplasmic bridges (which allow for the exchange of molecular components only). 
d). Their enlargement enables the cells to exchange micronuclei. 

Bacteria exchange plasmid material and the Paramecia exchange micronuclei.

Good luck to Steve! How is it in Neptune? XD

6 0

3 years ago

Which combination forms a covalent bond

Tju [1.3M]

Answer:

Two nonmetals form a covalent bond

Explanation:

Because its a chemical bond that involves the sharing of electron pairs between atoms.

7 0

3 years ago

How many different species are there?kings and kigdoms

Ivanshal [37]

Answer:

2 and 100 million

Because of the difficulties with both defining and tallying the total numbers of different species in the world, it is estimated that there are anywhere between 2 and 100 million different species.

8 0

3 years ago

Which one of the codons below would stop the translation of mRNA by ribosomal subunits?

Ostrovityanka [42]

Answer:

The correct option is D) UAG, UAA, UGA

Explanation:

The amino acid sequencing code or mRNA code contains specific codes which start and stop the process of translation at the right time. If the stop codon were not present then the ribosomal machinery would have made faulty proteins. If the stop codons are not at the right place, then it results in the production of faulty proteins. The stop codons which terminate the process of translation are UAG, UAA and UGA.

5 0

2 years ago