What is a test cross

1 answer:

7 0

It is a mating in which an individual showing a dominant phenotype is crossed with an individual showing its recessive phenotype. In a test cross, the unknown individual must be of a dominant phenotype because if the phenotype is recessive the genotype will have to be homozygous recessive.

You might be interested in

How does the sea ice in 2019 compare to the sea ice in 2012 during April?

Katarina [22]

The total amount of sea ice showed a decline from 2012 to 2019. The correct option would be D.

<h3>Graphical illustration</h3>

Looking at the graph, from February to June 2012, there is a decline in the amount of sea ice.

A similar decline in the amount of sea ice can be observed in the year 2019.

However, the sea ice levels for the various months in 2012 remain generally above the sea ice levels in the various months in 2019.

Thus, overall, one can say there is a general decline in the ice level from 2012 to 2019.

More on graphical illustrations can be found here: brainly.com/question/21376268

#SPJ1

4 0

1 year ago

Read the following title: Lines Composed a Few Miles Above Tintern AbbeyWhat type of information does this title most likely giv

Airida [17]

Answer: The speaker dosent open with a description of the veiw or even an explanation of where he is

Explanation:

5 0

2 years ago

A biologist in Pennsylvania observes the interactions of populations of maple trees,mosses, eastern spotted skunks, peregrine fa

Alecsey [184]

Answer:

The biologist is studying about the ecological community.

Explanation:

The ecological community refers to the community in which population of different types of species survives together. As the biologist is observing about the interaction of different populations of Pennsylvania region, it can be inferred that the he is studying about the ecological community of Pennsylvania region.

The population surving in the community interact with each other through different modes of interaction. It may either parasitic, or mutual, or competitive or predication or commercialism.

7 0

2 years ago

Members of the phylum Actinobacteria have had a profound impact on human health over the course of civilization. One member of t

Drupady [299]

Answer:

The correct answer would be - mycobacterium, and streptomyces.

Explanation:

Actinobacteria is a phylum that consists of a group of gram-positive bacteria with cytosine and guanine content in their DNA. These bacteria can be aquatic or land bacteria. Actinobacteria do not have cell wall however they make a non-sptate and mycelium.

Mycobacterium is one of the genera of the actinobacterium phylum. This genus includes pathogenic species in it that cause deadly diseases in humans and other mammals such as leprosy and tuberculosis Whereas streptomyces is another genus of the actinobacteria that is yielded the very first drug to fight with the ancient scourge.

Thus, the correct answer is - mycobacterium and streptomyces.

8 0

2 years ago

PLEASE HELP WITH THESE <br><br>just say which number you answered

zubka84 [21]

I got two, but I could be wrong.

6 0

3 years ago