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Andrew [12]
3 years ago
13

Which include the male and female sex cells

Biology
1 answer:
KiRa [710]3 years ago
4 0
  <span>Males and females are attracted to each other in order to ensure the viability and fertility of the offspring, which is also why it is uncommon that males of one species be attracted to females of another. Members of two different species cannot mate and thus cannot produce fertile, viable offspring, unless they are part of different sub-species. But they must be part of the same species. 
</span>
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A pure-breeding fruit fly with curled wings mates with a pure-breeding fruit fly with normal (straight) wings. The F1 mate with
vesna_86 [32]

Answer:

The dominant curled wing allele is also a recessive lethal.

Explanation:

If we look at the F2 ratio we see that :  

curled wings: straight wings= 160:80

                                               =2:1

Hence,  if curled wings is considered to be a dominant trait then Curled wings * straight wings

Dd x dd

Punnet square will be as follows :

           d                    d

D   |    Dd   |        Dd

d    |    Dd   |        dd

Hence in order to get F2

Dd x dd

Punnet square will be the same as above if the F1 cross is Dd* Dd

        D    d

D DD Dd

d Dd dd

if DD is lethal then the ratio is

Dd:dd=2:1

that is curled wings: straight wings=2:1

Hence, The dominant curled wing allele is also a recessive lethal.

6 0
4 years ago
100 POINTS AND BRAINLIEST!
Vikentia [17]
If it were me I would totally do any GMO plant such as corn, which has come such a long way in recent years, or do some research on genetically modified chickens, which have been modified to provide more meat or even lay eggs with anti-cancer drugs. :)
8 0
3 years ago
Which of the following includes a plant embryo, a food supply, and a protective covering?
Arlecino [84]
Answer C; a seed contains the plant embryo, surrounded by a food supply, further surrounded by a protective covering. Soak a dry butterbean in water for a few hours, then carefully open it up. You will see all three parts.
6 0
3 years ago
Read 2 more answers
Which statement best describes a function of glucose in plant cells?
Arada [10]

Answer:

4

Explanation:

Glucose is where most organisms derive their energy, so plants would use it in cellular respiration (the cellular metabolic process that makes energy/ATP) which does occur in the mitochondria.

7 0
3 years ago
Part 1: Cats Falling Out of Windows
xenn [34]

The way that the number of injuries per cat relate to the number of stories a cat falls is that:

  • As we examine the data about cats dropping from a given number of stories, a tendency becomes obvious. The cat sustains more wounds from story one to story eight than in the previous stories combined. Despite the fact that there are fewer injuries in the last category.

<h3>Why do cats survive after jumping off of a tall building?</h3>

High-rise syndrome describes the wounds that cats can get when they fall from a steep height, like an inside second-floor landing or balcony, out a window, down a fire escape, or when they fail to jump from a landing to a higher architectural element, like a ledge or window.

Cats may live comfortably in apartments and high-rise buildings, but we must make sure they have enough stimulation and playtime.

Therefore, According to Jim Usherwood of the Royal Veterinary College's structure and motion lab, stated that cats have long, flexible legs. "They have respectable muscle mass. Since they can jump rather well, the same muscles focus their efforts on slowing down rather than shattering bones."

Learn more about injuries  from

brainly.com/question/17275958
#SPJ1

3 0
1 year ago
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