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lesantik [10]
2 years ago
13

How many megaspores and how many sperm cells are involved in a double fertilization event?.

Biology
1 answer:
KIM [24]2 years ago
7 0

Explanation:

In the megasporan- gium of each ovule, the megasporocyte divides by meiosis, producing four megaspores. One survives and forms a female gametophyte. Fertilization: In nucleus of developing endosperm-- Double fertilization occurs. One sperm fertilizes the egg, forming a zygote.

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Which term describes the example below?A child with no freckles has a mother who has freckles and is heterozygous and a father w
Natali5045456 [20]
It is C as to have freckles you have to have a dominant and recessive gene (can be worked out using a punnett square) as the child has 50% of not having freckles like his dad or 50% having freckles like his mom. 
                     male genes(homozygous recessive)
                     f            f

female    F    Ff           Ff
genes
              f     ff             ff

so ff is not having freckles and being homozygous recessive, or Ff having freckles and being heterozygous.

So the child is heterozygous  so C
3 0
3 years ago
Please HELP////2. A couple are both phenotypically normal, but their son suffers from hemophilia, a sex-linked recessive disorde
katrin [286]

Answer:

1/4 suffer from hemophilia

1/4 are heterozygous

Explanation:

So since they are normal but their son isn't it is assumed that the mom is the carrier since the dad has to be X^HY

X^HY x  X^HX^h

Set up a pedigree

X^HX^H X^HX^h

X^HY     X^hY

1/4 suffer from hemophilia (X^h)

1/4 are heterozygous (X^HX^h)

8 0
2 years ago
Heritability refers to the extent to which trait variations among individuals are attributable to their differing
LUCKY_DIMON [66]

Answer:

Phenotypes

Explanation:

Heritability refers to the extent to which trait variations among individuals are attributable to their differing observable and most often definitive or measurable physical features, often called phenotypes. Examples of this variation could be something like height or eye colour. Basically it has to be traits that depend on genetics that environmental factors

6 0
3 years ago
A male deer (stag) has long and heavy antlers while the female (doe) does not, Explain the purpose of this genetic variation and
Liono4ka [1.6K]

Antlers are generally only found on male deer in other species of deer. Females with higher-than-normal testosterone levels, on the other hand, can grow antlers.

<h3>Why Do Deer Grow Antlers?</h3>

Antlers are grown by male deer to lure female deer for mating. Females will be shown a display as the antlers are developing during mating season, with each male attempting to become the most dominating.

Deer utilize their antlers to protect themselves from predators and other deer. When deer attack each other, their antlers might lock together, forcing the deer to starve to death.

For more information regarding antlers, visit:

brainly.com/question/17295060

#SPJ1

8 0
2 years ago
Cell membranes are made up partly of fats.What type of macromolecules are fats?
GarryVolchara [31]

The answer is....... (drumroll)........ lipids!

6 0
3 years ago
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