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Svetradugi [14.3K]
3 years ago
12

Persons with XX at the 23rd pair produce __ and those with XY at the 23rd pair produce __. *

Biology
2 answers:
kari74 [83]3 years ago
5 0
B.

Females have two copies of the X chromosome, while males have one X and one Y
Veseljchak [2.6K]3 years ago
4 0

Answer:

B

Explanation:

XX is female they produce eggs. XY is male. they produce sperm

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Mendelian inheritance states that traits are determined when offspring receive for each trait from . Traits can be , which means
vovangra [49]

Answers:

  • Mendelian inheritance states that traits are determined when offspring receive <u>alleles </u>for each trait from <u>Parents</u>.

Explanation:

As per Mendel, all the traits which are present in an offspring are determined by specific genes which exist in alternate forms called alleles. For example: The height of a plant is a trait which is determined by alleles T for tall height and t for small height of same gene. The organisms acquire these alleles from parents (one allele from each parent).

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  • Traits can be <u>Dominant </u>which means they can be seen and are capable of masking a different trait.

Explanation:

Dominant trait means when only a single dominant allele for the trait in an organism is enough for the organism to depict the trait. For example: In pea plant, purple flower color is a dominant trait over white. So any plant who contains only one dominant allele for purple (allele P) will have purple flowers but all plants that have two pp alleles will have recessive trait i.e White flowers.

-------------------------------------------------------------------------------------

  • Traits can also be <u>Recessive </u>which means they can be masked.

As mentioned in above example, white flower color of pea plant is a recessive trait. Recessive means that if a plant has one copy of recessive and one copy of dominant allele, the dominant allele will suppress or mask the effect of dominant allele. Example is the above case of flower color when a plant with genotype Pp will have purple but not white flowers.

-------------------------------------------------------------------------------------------

  • Alleles are different versions of the same <u>gene </u>in an organism.

Alleles are just alternate forms of a gene. For example if a plant height is determined by a gene L, it has two forms capital L and small l which are alleles of same gene. But capital L is for tall height and small l is for short height.


Hope it help!

3 0
3 years ago
Read 2 more answers
Which organelles are found in both plant and animal cells?
igor_vitrenko [27]
<span>Structurally, plant and animal cells are very similar because they are both eukaryotic cells. They both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisomes. Both also contain similar membranes, cytosol, and cytoskeletal elements.</span>
4 0
4 years ago
Help!!!! Me pls !!!!!!!
Darya [45]

Answer:

C

Explanation:

the first 2 choices aren't even systems at all, and D is specifically talking about the water and not mentioning animals/plants at all.

hope this helps!

7 0
3 years ago
What type of community relationship does a grizzly bear and a salmon fish have
Nookie1986 [14]

Answer:

i not 100% sure but it might be that grizzly bears eat salmon

Explanation:

4 0
3 years ago
Which of these is an example of sexual reproduction in plants?
yulyashka [42]

C) The flower of a plant produces seed. I hope this helped and i'm sorry if it's wrong

6 0
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