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Dihybrid Cross Amoeba Sisters Video Recap

Amoeba Sisters Video Recap worksheet on Dihybrid Crosses using Mendelian genetics. Focuses on pea plant traits (color and texture), Punnett square practice, genotype/phenotype identification, and understanding inheritance probabilities.

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    □ (HYBRID CROSSES (MENDELtAN) A M O E B A SISTERS: VFDEO RECAP Amoeba Sisters Video Recap: Dihybrid Crosses (Mendelian Inheritance] Vocabulary practice! You probably have had enough of cats with our video. On t o peas! In pea plants, yellow peas (coded for by a dominant allele Yj are dominant to green peas (requiring two recessive alleles y). Round peas [coded for by a dominant allele R) are dominant t o wrinkly peas (requiring two recessive r alleles). These are actual pea plant traits, by t h e way! For the following, p ease write in the genotype or phenotype. Some are filled i n foryou. Gtnotypa Phinotyp* YYRR Yellow, round I'.nr.r. ____ Green, wrinkhrd YyRr 2, yirllow round ____________ yyRR 3_ green round yyRr 4 j r « " rou O 5-YYrr______ o r Tver Yellow, wrinkled b. Or Green, round 7. Analieie is a form o f a gene. In the cross HhSs x hhss, h o w many alleles does a kitten inherit from the mother? 8. How many a leles does a kitten inherit from the father? 9. Gamete which are sex cells, carry the alleles. Why must a gamete carry oneallele (represented by a letter) from each gene? Meaning, why can t a gamete carry an "hh" instead o f a r "hs ' or ar "Hh‘ instead of a "US? 1 EiKti « I U n r r d i it f i l i r o f ollvtat l o r fijcti t r a i t I h r cqg w i l l « r r y MW ropy of cJCh 4rd I hr sprri* w i l l fl'.VO carry <wt one copy each t o irate a cwolete s e t f o r ferlizatUHi The Dihybrid Problem Solve Read the beginning part about pea plants again Bernard really likes growing peas i n his garden, but the peas he likes are green. He also likes tnem t o have a wrinkled texture, because he thinks they look much more interesting that way. Please work out a YyRr x YyRr (heterozygous cross) on the back o f this sheet or on another paperwhile showing all work- 10. After showing your work to use as support, what is the chance that Bernard will have pea plant offspring that match the phenotype be is looking for I green, wrinkled)? 11. What is the phenotype ratio o f this heterozygous cross? fyefloiy, round): (yellow, wrinkled): (green, roundJ . (green, wrinkled) 12. If Bernard did not receive any pea plants that were green and wrinkled i n actuality, would you know for sure that t h e parent genotypes were incorrect? Why or why not? r : . ’ flljn'. Mould n l / j - 6 chsnr r o f b r j n w r i n k l r d . ; 1 | i j u j t 4 p r a b i t h i l t r fflf f4cti pl*?t out arm 1/lt i s iood er s ( 5 . Amoeba Sisters LLC \ © AIL reserved

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