We'll make the alleles: Cc.
C is a healthy parent, and c is the cystic fibrosis (recessive).
If you make a punnett square and the parents are both Cc (healthy), then you would get CC, Cc, Cc, and cc. That cc is a 25% chance that the offspring will have that, which means there is a 25% chance the child will have cystic fibrosis.
Two healthy parents can have a child with cystic fibrosis if both the parents have the dominant allele and recessive allele, if both the parents have heterozygous alleles.
The Earth's lithosphere is 100km while astehnosphere is 660km so this statement stands true.
Other statements are false like Earth’s mantle is thinner than its oceanic crust as Earth’s mantle is around 3k km while its oceanic crust is just 5km.
Also, Earth’s outer core is thicker than its mantle and Earth’s continental crust is thicker than its lithosphere is false as well.
The invertebrate chordates include Tunicates and lancelets.
<h3>What are invertebrate chordates?</h3>
They are a group of chordates that possess notochords somewhere in their life span but end up not possessing the vertebral column. They possess all the characteristics of chordates.
Invertebrate chordates include the Urochordata which are the Tunicates and the Cephalochordata which are the lancelets.
More on invertebrate chordates can be found here: brainly.com/question/1969651
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Although they are radically symmetrical,echinoderms are more closely related to human than to a jellyfish because they are biltarian.
Explanation:
seeds are the prime stage of a plant to it's development journey .
It's main function is the development and nourishment of embryo.
there is food already received in seed.
in the stage of development it provides with amount of water and help in development...
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